Dometic VacuFlush 1600 Series User manual

1
CARAVAN SANITATION SYSTEM
OWNER’S MANUAL
VacuFlush®1600 Series Toilets and
Holding Tank Systems for European Caravans (HTS-EC)

2
TABLE OF CONTENTS
Features 2
Model Numbers and Dimensions 3
Key System Components 4 - 5
Important Information Before Operation 5
System Start-Up 5
Vacuum Toilet Operation 6
Holding Tank Operation – Discharge 6
Cleaning – Holding Tank 6
Winterizing – Holding Tank 6
Proper Toilet Cleaning and Maintenance 7
Winterizing – Toilet 7
Maintenance Schedule 8
Spare Parts 8
Service Tip 8
Ordering Parts 8
Toilet Model Identification 9
Special Toilet Tissue and Cleaner 9
Troubleshooting Guide 10 - 12
Parts Lists 13 - 19
Wiring 20
Parts Distributors 21
Sales Offices 22
Manufacturer's Warranty 24
FEATURES
Dometic Caravan Sanitation Systems are the newest standard in mobile sanitation. Each system is comprised of a
VacuFlush 1600 series toilet and a vacuum holding tank system – a fully integrated vacuum generator/holding tank
module designed specifically for European caravans.
The Comfortable Choice. Dometic VacuFlush toilets are
handcrafted from vitreous china, are easy to clean and are
durable – much like the one in your home. The lustrous bowl
provides all the beauty and easy cleanability of a household
toilet, while the full-size seat and lid provide the same comfort.
Fully Integrated Design. Dometic HTS-EC systems combine
the vacuum generator, level indicators, discharge pump and
holding tank into one, easy-to-install package. Available in 35-,
60-, and 90-liter capacities.
Extended Tank Capacity. Because the VacuFlush®toilet
consumes as little as 0.4 liters of water per flush, the
holding tank provides sufficient capacity for several days of
travelling without having to empty the onboard system.
Vigorous Flushing Action. Vacuum action clears the bowl
in an instant while fragmenting the waste before it enters
the holding tank.
No Unpleasant Odours. No Chemicals. The holding tank
is fitted outside the bathroom with an in-line filter that stops
malodours from escaping through the vent connection.
Easy Operation. The status panel in the bathroom signals
when it is okay to flush, when the holding tank is full, and
when the vacuum level is too low for flushing. A separate
monitor panel displays the tank capacity status. A safety
feature automatically shuts down the sanitation system if
the holding tank is full.
Unmatched Durability. Holding tank comes with nominal
10 mm wall thickness. All inlet and outlet fittings connect
from the top of the tank for easy access.
Dumping with a Push of a Button. No cassette tanks to
carry – just position your vehicle within a few meters of the
dumping station, unroll flexible sanitation hose, and turn on
the discharge pump. The tank is emptied in minutes.
Read and understand the complete contents of this manual before operating or servicing the holding
tank system. Failure to follow these precautions may result in damage to the sanitation system.
Dometic reserves the right to change specifications without notice.
WARNING – PUMP STARTS AUTOMATICALLY.
Turn off electrical power before servicing.

3
MODEL NUMBERS AND DIMENSIONS
HTS-EC MODELS
35 HTS-EC
60 HTS-EC
90 HTS-EC
35 Liters
9.2 Gallons
60 Liters
15.8 Gallons
90 Liters
23.8 Gallons
20.2 Kg
44.5 Lbs.
22.9 Kg
50.5 Lbs.
27.4 Kg
60.5 Lbs.
55.3 Kg
122 Lbs.
83 Kg
183 Lbs.
117.9 Kg
260 Lbs.
27
47
70
Number of
Flushes*
Max. WeightWeight
Usable
Capacity
Size
Length x Width x Height
Model
619mm x 416mm x 578mm
24 3/8" x 16 3/8" x 22 3/4"
718 mm x 362 mm x 657 mm
28 1/4" x 14 1/4" x 25 7/8"
902 mm x 330 mm x 746 mm
35 1/2" x 13" x 29 3/8"
MODELS 1609, 1648
MODEL 1606
*
* Width measurement
includes flush pedal.
35 HTS-EC 60 HTS-EC 90 HTS-EC
1606
1609
1648
10 Kg
22 Lbs.
10.4 Kg
23 Lbs.
10.4 Kg
23 Lbs.
All models flush with as little as .47 liters (1 pint) of water. Dimensions may vary 10mm (3/8"). Weights may vary 5%.
WeightDescription Size
Length x Width x Height
Model
495 mm x 438 mm x 356 mm
19 1/2" x 17 1/4" x 14"
495 mm x 378 mm x 457 mm
19 1/2" x 14 7/8" x 18"
495 mm x 378 mm x 457 mm
19 1/2" x 14 7/8" x 18"
Low-profile vacuum toilet. Below-floor discharge.
Standard-height vacuum toilet. Below-floor discharge.
Standard-height vacuum toilet. Above-floor, rear discharge.
1600 SERIES TOILETS
* VacuFlush toilets use as little as 0.4 l (0.11 gal.) of water per flush. Because we recommend adding more water when flushing
solids, we conservatively estimate average water use at 0.76 l (0.2 gal.) per flush. Total effluent averages 1.29 l (.34 gal.) per flush.

4
KEY SYSTEM COMPONENTS
Vacuum Toilet: The VacuFlush toilet operates differently as compared to other
toilets. VacuFlush systems use a small amount of water (from as little as 400 ml) per
flush in addition to a powerful vacuum. The toilet is connected to a pressurized fresh-
water system. Because a vacuum generator is located between the vacuum toilet
and the waste holding tank, the result is an odor-free bathroom compartment.
VacuFlush toilets are equipped with an integral anti-siphon vacuum breaker which
prevents the possible contamination of the fresh water supply.
Vacuum Generator: The vacuum generator creates the vacuum required to move
waste from the toilet to the waste holding tank. It combines a vacuum tank and a
vacuum pump in one unit. System vacuum level is monitored by a vacuum switch
located on the vacuum tank. When this switch senses a drop in vacuum in the
system, it automatically signals the pump to energize and bring the vacuum to oper-
ating level. This process is normally completed in less than one minute. The vacuum
pump design is both an efficient air and liquid pump that handles solids without a
problem. It has two duckbill valves on each side of the pump chamber to maintain
vacuum and prevent backflow of waste. It is manufactured of long-lasting polypropy-
lene and draws only 4 to 6 amps of current at 12 volts DC.
VacuStat®Status Panel: The status panel is mounted in the bathroom. A green
light indicates that sufficient vacuum is available for the next flush. The red light
indicates that the vacuum is building and the pump is running. The red light also
indicates that the holding tank is full and the pump has been deactivated until the
tank is emptied.
TankWatch®Level Monitor: Includes four tank level indicator lights – Empty,
Low, Mid and Full, and international symbology of four tank levels. One light is
always on to indicate that system is operating. Panel is connected to three (Empty,
Mid, Full) probes in holding tank. No electrical components come in contact with
waste or water. Operates on 12 or 24-volt DC. Uses only .017 amps at 12 volts.
VacuFlush Shutdown Relay: To prevent overfilling of a holding tank, a
shutdown relay is supplied as standard with the TankWatch panel. The relay
shuts off power to the vacuum generator when the holding tank reaches the
"Full" level, preventing overfilling of the holding tank.
Vacuum
Generator
Vacuum
Toilet
VacuStat Panel
TankWatch Panel

5
Tank Full
Float
Switch
SaniGard Vent
Filter
KEY SYSTEM COMPONENTS (cont'd)
SaniGard™Holding Tank Vent Filter: The vent
filter stops odors that escape from the holding tank
vent. It contains odor-removing filter media to keep
your boat smelling clean and pleasant. Each cartridge
is good for an entire season and is easily replaced for
a fresh start.
"Tank Full" Float Switch: The Tank Full Float Switch is mounted in top of the
holding tank or vent pipe, and shuts the vacuum pump or vacuum generator off when
the float switch is activated by the rising contents of the holding tank. This relay also
sends a signal to the status panel red light. This relay is prewired and mounted to the
pump on the vacuum generator. For systems using a vacuum tank and separate
pump, it is mounted separately during installation and wired accordingly.
SaniPump™ Discharge Pump: For thorough, trouble-free holding tank
pump-out, our discharge pump offers many benefits. Its specially designed bellows
diaphragm allows it to run dry without harm. It handles up to 315 gallons (1192
liters) per hour, while drawing only 6 amps at 12 volts DC.
NOTE: On/Off switch for discharge pump is supplied by installer.
Discharge Hose: Reinforced, 32 mm ID, 3-meter discharge hose. Includes
38 mm adapter to connect to discharge pump outlet.
Discharge
Hose
Discharge
Pump
1. Fill freshwater tank and add deodorant to holding tank through toilet bowl.
2. Make sure all guests understand the operation of the VacuFlush system and the instruction label is in plain
sight and easy for guests to read. If this label is not included in this manual, please contact Dometic’s
Customer Service Department immediately.
3. Remember the vacuum pump starts automatically.
Shut off the electrical power to the system before
servicing and do not leave the recreational vehicle
with toilet system breaker on.
4. Never use drain openers, alcohol, solvents, etc.
in the system.
5. If the system does not function properly, refer to the
Troubleshooting Section of this manual and repair
as necessary. If problem persists, contact your local
Dometic product dealer or see the Customer
Service section of this manual.
IMPORTANT INFORMATION BEFORE OPERATION
SYSTEM START-UP
1. Turn on electrical power to sanitation system.
2. Flush water into system by depressing flush lever on toilet until water starts flowing through the vacuum pump and
into the holding tank (blackwater tank). This wets the pump interior for efficient operation. If the vacuum pump
does not run, check for loose electrical connections. Refer to the system Wiring Diagram.
3. The vacuum pump will run for approximately 30 to 90 seconds until the system reaches operating vacuum level
and then will shut off.

6
VACUUM TOILET OPERATION
1. To add water to the toilet before
using, raise flush lever until desired
water level is reached. Generally, more
water is required only when flushing
solids.
2. To flush toilet, press flush lever
sharply down to the floor until contents
clear bowl. A sharp popping noise is
normal when the vacuum seal is bro-
ken and flushing action begins.
Be sure to hold lever down for three
seconds. If flush lever is accidentally
released before waste clears bowl, do
not attempt to flush toilet again until
vacuum pump stops running. A small
amount of water should remain in the
bowl after flushing.
3. Do not dispose of sanitary napkins
or other non-dissolving items in toilet,
such as facial tissue or paper towels.
These items can cause plugging of the
system. Refer to the Deodorants and
Special Tissue section in this manual
for more information.
HOLDING TANK OPERATION – DISCHARGE
1. Position vehicle close to sewage dumping facility.
2. Unroll discharge hose, remove plastic cap, and insert end into dumping facility.
3. Activate discharge pump.
4. After tank is empty, the tank can be rinsed. (Note: Rinsing systems vary by vehicle. Consult vehicle dealer.)
5. Discharge rinse water into dumping facility. Drain all water from discharge hose. Put plastic cap on end of hose.
Roll up and store hose.
WINTERIZING – HOLDING TANK
If using antifreeze to winterize the holding tank system, use only propylene glycol freshwater antifreeze that does not
contain alcohol. Antifreeze that contains alcohol will result in damage to your sanitation system.
1. Pump out holding tank.
2. Thoroughly flush the system with fresh water before adding propylene glycol freshwater antifreeze to the HTS.
3. Turn off electrical power.
CLEANING – HOLDING TANK
A small amount of water remains in all holding tanks. It is good practice to rinse the tank after the contents have been
discharged. This can be accomplished by adding water to the toilet bowl. Add 237 ml (8 oz.) of SeaLand®Holding
Tank Deodorant to the bowl. Flush the entire contents into the holding tank and continue flushing until the discharge
from the holding tank is clear.
Do not use chlorine-based cleaners, caustic cleaners or chemicals, such as drain-opening products, as they
may damage the system’s seals and hose.

7
Dometic china toilets should be cleaned regularly for maximum sanitation and
operational efficiency. You can clean it just as you would a household toilet.
Do not use caustic chemicals, such as drain-opening types, as they will
damage the seals.
BOWL CLEANING: For stubborn stains, use SeaLand®Bowl and Seal Cleaner
(Fig. A). It’s manufactured especially for use with Dometic toilets. In certain
locations where water is hard, a build-up of lime may dull the toilet bowl finish.
Restore the shine with this SeaLand cleaner. If you cannot find it in your area,
contact Dometic for your nearest dealer. If this cleaner is not available, you can
also use Bar Keepers Friend®cleanser. It is not necessary to vigorously scrub
with either product. Please follow label instructions.
SEAL CLEANING: After an extended time, mineral deposits from hard water can
build up under the edge of the rubber bowl seal, resulting in a slow leakdown of
water from the bowl. To prevent this mineral build-up, periodically clean under the
bowl seal with SeaLand Bowl and Seal Cleaner (Fig. B).
1. Shut off water supply and power to vacuum pump or vacuum generator.
2. Apply cleanser onto a cleaning brush, open the flush ball by pressing on flush
lever, and scrub under the seal. Make sure to push brush bristles between
bottom of seal and top of flush ball surface to scrub all parts of seal that come
into contact with flush ball.
3. Close ball and wait 2-3 minutes.
4. Open flush ball. Use brush and water to rinse away cleanser and loosened deposits.
5. After cleaning, turn on water and electrical power to toilet system.
PROPER TOILET CLEANING AND MAINTENANCE
Fig. A
Fig. B
WINTERIZING – TOILET
At the end of each season, the Dometic toilet should be winterized for storage by either draining or using potable
water-safe antifreeze in the system.
To drain:
1. Thoroughly flush system with fresh water.
2. Empty holding tank.
3. Model 1606 only: Shut off water supply to toilet(s), and remove inlet waterline (Fig. C). Do not remove brass
cap on bottom of valve.
Model 1609, 1648: Shut off water supply to toilet(s), and remove plastic cap from bottom of brass fitting (Fig. D).
Do not remove brass fitting on bottom of water valve.
4. Press flush lever until all water is drained from toilet(s).
Fig. C Fig. D

8
SPARE PARTS
It is recommended that the following parts be kept at all times. They are especially important for vacuum system
emergency repair when you are in areas where replacement parts are not readily available.
MAINTENANCE SCHEDULE
Maintenance intervals and normal parts replacement vary widely depending on numerous factors such as
frequency of system use, quality of flushing water, etc. The following chart is intended strictly as a general guide in
keeping the sanitation system 100% ready for any conditions of use.
Description Part Number Quantity Where Used
Flush Ball Seal
Flush Ball
Water Valve
Vacuum Breaker Assembly
Vacuum Switch Kit
1.5-inch Duckbill Valve Kit
(2 ea. per kit)
see Parts List
see Parts List
see Parts List
see Parts List
see Parts List
310076
1
1
1
1
1
2
Vacuum Toilet
Vacuum Generator
(or Vacuum Pump and
Vacuum Tank)
Maintenance Procedure Recommended
Date of Service Parts Required
Toilet flush ball seal cleaning
Tighten toilet seat mounting
hardware
Monthly
Monthly
(or as needed)
SeaLand Bowl and Seal Cleaner
N/A
ROUTINE MAINTENANCE
Replace duckbill valves in vacuum
generator or vacuum pump
Replace flush ball seal and flush
ball (if needed)
Every three years
Every three years
Duckbill Valve Kit:
Item No. 310076 (2)
Flush Ball Seal: see Parts List
Flush Ball: see Parts List
MAJOR SYSTEM MAINTENANCE
ORDERING PARTS
Dometic is ready to assist you in the event that service is required. Before calling your local dealer or parts
distributor, please have the following information available. Your cooperation in having this information ready is
appreciated.
1. Toilet Model Number (See following section.)
2. Serial Number
3. Part Number, Description and Quantity (See Parts List information.)
SERVICE TIP
Checking for water leaks behind or under toilets or other appliances can make it difficult to locate the source. Dripping
water at room temperature makes it difficult to feel wetness. Taking four or five sheets of toilet tissue and wiping all
seams and waterline connections offers a simple means of locating the general area of the leakage. Start at the top of
the unit since gravity will cause a leak to run downward. When the tissue comes in contact with the leaking water, it will
immediately change texture.

9
TOILET MODEL IDENTIFICATION
The model identification label is located on the toilet base,
and will show the model number and serial number. The
label for Model 1606 is located on the base under the pedes-
tal cover. VacuFlush 1609 and 1648 models' identification
labels are on the back of the base. If label is not available,
please refer to “Model Numbers and Dimensions” on page 3
for toilet model identification.
DOMETIC CORPORATION
P.O. BOX 38, 13128 STATE RT 226 [phone]
BIG PRAIRIE, OH 44611 USA
MODEL NO. 000
SERIAL NUMBER
000000
SPECIAL TOILET TISSUE AND CLEANER
Why Not Use Household Toilet Paper in Your Dometic Toilet. Household tissues often contain adhesives which
bond together the paper fibers from which the tissue is made. The adhesives prevent the tissue from breaking apart,
and their use in “ultra-low flow” systems can cause system clogging. SeaLand tissues are especially designed for use
in low water toilet systems. Their rapid-dissolving properties minimize the amount of residual paper in the holding tank
and contribute to more through pump-out of the waste holding tank.
SeaLand Bowl and Seal Cleaner: This cleaner is specially formulated to clean quickly and effectively without harm-
ing the vitreous china finish, as well as the vacuum and water seals in the VacuFlush system. Refer to page 7 for
proper cleaning procedures.
SeaLand versus Other Brands: Dometic constantly strives to provide our system owners with effective products that
have minimal environmental impact and good value. Many other competitive products do not measure up to our
standards of performance and value.
SeaLand®
Cleaner
16-oz. bottle
Part No.
379314016
SeaLand®
Rapid-Dissolving
Toilet Tissue
Four 400-sheet rolls
Part No.
379441204
SeaLand®
Ultra 2-Ply
Rapid-Dissolving
Toilet Tissue
Four 500-sheet rolls
Part No.
379441205

10
MODEL 1606
BASE ASSEMBLY
REAR VIEW, VACUUM TOILET
TROUBLESHOOTING GUIDE
VACUUM BREAKER / BOWL
CONNECTION
HOSE
CONNECTION
MODELS 1609, 1648
BASE ASSEMBLY
1. Water will not stay in bowl. a. Loose clamp ring.
b. Improper seal around flush ball
due to dirt or debris on underside
of ball seal.
c. Worn or damaged seal.
d. Worn or damaged flush ball.
a. Tighten clamp ring adjusting screw.
b. Inspect flush ball and underside
of seal for foreign objects. Clean
under seal if needed (see page 7).
c. Replace seal.
d. Replace flush ball.
Problem Possible Cause Service Instructions
ADJUSTING NUT
FLUSH BALL
SPRING
CARTRIDGE
WATER VALVE ASSEMBLY
TOP VALVE CAP
FILTER SCREEN
WATER
VALVE
SCREWS
VALVE BODY
SHAFT
FLUSH PEDAL
PEDAL
COVER
CLAMP RING
BALL SEAL
ADJUSTING NUT
SPRING
CARTRIDGE
WATER VALVE ASSEMBLY
TOP VALVE CAP
FILTER SCREEN
WATER VALVE SCREWS
VALVE BODY
SHAFT
PEDAL
COVER
CLAMP RING
BALL SEAL
FLUSH BALL
CAM STRAP

11
TROUBLESHOOTING GUIDE
2. Flush ball will not close
completely.
3. Water does not shut off in
toilet (toilet overflows).
4. Water does not enter toilet
bowl properly.
5. Water leaking from water
valve. (See Service Tip on
page 8.)
6. Water leaking from rear of
toilet bowl.
(See Service Tip on page
8.)
7. Vacuum pump running too
much between flushes.
(See Vacuum Tester
information on page 7.)
8. Toilet will not flush.
(No vacuum.)
a. Clamp ring is overtightened,
causing too much tension on
seal and flush ball.
b. Weak or defective flush lever
return spring.
a. Dirt lodged in water valve seat.
b. Flush lever cam strap is bent
down, holding water valve open.
c. Worn or defective water valve.
d. Worn or defective flush lever
return spring.
a. Low water pressure.
b. Water valve clogged.
a. Loose connection.
b. Worn or defective water valve.
c. Water line connection not seated
properly.
a. Loose hose connection.
b. Loose vacuum breaker.
c. Defective vacuum breaker.
d. Cracked or defective toilet bowl.
a. Flush ball leaks.
b. Vacuum line leak.
c. Duckbill valves in pump not
sealing. (This problem occurs
gradually. The pump takes
longer periods of time to
shut off between flushes.)
d. Pump bellows worn or damaged.
a. Vacuum pump will not run.
b. Plugged vacuum line between
toilet and vacuum breaker.
c. Duckbill valves or vacuum pump
installed backwards.
d. Vacuum pump inlet or
outlet lines plugged.
e. Plugged vacuum tank or vacuum
generator.
a. Loosen clamp ring.
b. Check spring tension by letting
up on flush lever suddenly.
If lever does not snap back,
replace spring cartridge assembly.
a. Disassemble and clean water
valve.
b. Bend front of cam strap up about
1/16" (1.6mm). (Model 1606 only)
c. Replace water valve.
d. Replace spring cartridge.
a. Check incoming water pressure.
b. Remove and clean filter screen
inside water valve inlet.
a. Tighten bottom cap, inlet fitting
and outlet hose clamp.
b. Replace water valve.
c. Remove water line and
assemble correctly.
a. Tighten hose clamp.
b. Check breaker/bowl connection.
If loose, push breaker into bowl.
c. Replace vacuum breaker.
d. Replace toilet bowl.
a. Leave small amount of water in
toilet. If water is sucked from
bowl, see problems 1 and 2.
b. Check all piping connections
between toilet and vacuum tank.
c. Disassemble inlet and outlet
fittings on pump and inspect all
four duckbill valves. If valves
are not sealing, replace them.
d. Inspect bellows in pump for
small hole or rip.
Replace if necessary.
a. See problem 9.
b. Disconnect line and clear plug.
c. Make certain pump and duckbill
valves are installed correctly.
Replace valves if stuck open.
d. Disassemble and clean.
e. Unplug vacuum tank or vacuum
generator.
Problem Possible Cause Service Instructions

12
TROUBLESHOOTING GUIDE
Problem Possible Cause Service Instructions
9. Vacuum pump will not run.
10. Vacuum pump will not
shut off.
11. Vacuum pump running too
slow, overheating, or
tripping circuit breaker.
12. Vacuum pump emits odor.
13. Blockage between toilet
and vacuum generator or
vacuum tank.
a. No electrical power.
b. “Tank full” float switch is stuck
c. Loose or broken electrical wiring.
d. Faulty vacuum switch.
e. Faulty motor.
a. Excessive vacuum leak.
b. Faulty vacuum switch.
c. Duckbill valves in vacuum pump
are defective.
d. Vacuum pump or vacuum
generator needs primed.
e. Improper wiring.
a. Low voltage.
b. Loose or corroded wiring.
c. Wire size is too small.
d. Discharge line is blocked
between vacuum pump and
holding tank, causing high back
pressure.
e. Plugged or defective duckbill valve
in vacuum pump.
f. Plugged holding tank vent line.
g. Pump motor worn or defective.
h. Pump bellows clogged with
tissue.
a. Loose or defective hose
connections on pump.
b. Torn or punctured pump
bellows.
a. Collapsed vacuum line.
b. Too many elbows or bends in
vacuum line.
c. Improper operation of toilet.
d. Flushing foreign objects down
toilet.
a. Check input power, circuit
breaker.
b. Remove switch and clean or
replace.
c. Tighten or reconnect wires at
vacuum pump, vacuum generator,
vacuum tank, status panel, “tank
full” float switch relay.
d. Replace vacuum switch.
e. Replace motor.
a. See problem 7.
b. Replace vacuum switch.
c. Replace duckbill valves.
d. Prime pump by charging system
with water.
e. Check wiring. Refer to wiring
diagram.
a. Check for low voltage.
b. Tighten loose connections,
replace corroded wiring.
c. Replace with proper size wire.
d. Disassemble and clean
discharge line.
e. Disassemble pump and clean or
replace duckbill valves.
f. Disassemble and clean vent line.
g. Check motor and replace if
necessary.
h. Remove and clean. Use more
water during flushing.
a. Tighten connections.
b. Replace pump bellows.
a. Inspect vacuum line for collapsed
condition and replace line.
b. Reconfigure vacuum line to
reduce number of elbows.
c. Make sure toilet is being
operated correctly.
d. DO NOT flush any non-
dissolving items (i.e. sanitary
napkins, facial tissue, wet
strength tissue, paper towels,
etc.) or excessive toilet tissue
down toilet. Rapid-dissolving
SeaLand®toilet tissue is best.

13
PARTS LIST
MODEL 1606
MODEL 1609
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Item
Seat Assembly, White
China Bowl Kit, White
Ring & Half Clamp Kit, White
Teflon®& Rubber Seal Kit
Base Kit, White (includes items 3-11)
Ball, Shaft & Cartridge Kit
Floor Flange Seal
Funnel Kit (includes item 7)
Flush Pedal Kit, White
Water Valve Kit
Spring Cartridge Kit
Mounting Kit
Supply Hose
Vacuum Breaker Kit
Vacuum Breaker Cover Kit, White
385344088
385310790
385310025
385316140
385310942
385310954
600343938
385310944
385310682
385310966
385310683
385310794
600340177
385310687
385310795
Description
Part No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Item
Seat Assembly, White
China Bowl Kit, White
Ring & Half Clamp Kit, White
Teflon®& Rubber Seal Kit
Floor Bolt Mounting Kit
Pedestal Cover Kit, White
Floor Flange Seal
Funnel Kit (includes item 7)
Ball, Shaft & Cartridge Kit
Pedal Cover Kit, White
Water Valve Kit
Spring Cartridge Kit
Flush Lever
Base Kit, White (includes items 3-13)
Supply Hose
Vacuum Breaker Kit
Vacuum Breaker Cover Kit, White
385344088
385310790
385310048
385316140
385310064
385310108
600341549
385318864
385318162
385310117
385314349
385236096
600340825
385310943
600340177
385310687
385310795
Description
Part No.

14
PARTS LIST
MODEL 1648
VACUFLUSH STATUS PANEL
1
2
3
4
5
6
7
8
600342400
600340471
600343786
600342493
600342652
600342495
600340488
385310730
VacuFlush Status Panel Housing
#6 x 1" Long Oval Phillips Head Screw
VacuFlush Status Panel Face Plate
Red Lens
Circuit Breaker, 10 amp
Green Lens
#6 x 3/8" Long Pan Phillips Head Screw
RV VacuFlush Status Control Panel
Item Part No. Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Item
Seat Assembly, White
China Bowl Kit, White
Ring & Half Clamp Kit, White
Teflon®& Rubber Seal Kit
Base Kit, White (includes items 3-11)
Ball, Shaft & Cartridge Kit
Funnel Kit
Flush Pedal Kit, White (includes item 12)
Water Valve Kit
Spring Cartridge Kit
Mounting Kit
Supply Hose
Vacuum Breaker Kit
Vacuum Breaker Cover Kit, White
385344088
385310790
385310025
385316140
385310941
385310954
385318741
385310682
385310966
385310683
385310940
600340177
385310687
385310795
Description
Part No.

15
PARTS LIST – 35 HTS-EC
35 HTS-EC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
385310930
600346604
600346795
385310931
600342781
385310937
600343023
385310938
600343689
313900100
385310932
385310933
385310934
600342932
385310935
385310939
600347167
317759012
385310635
Discharge Pump, 38 mm Adapter, Deutsch Connectors, 12 VDC
Nut, 1/4-20, SS
Washer, .625" x .281" x .05", SS
Quick-Connect 38 mm MPT Elbow
Slip Nut Seal
Diptube Kit
51 mm Uniseal®
19 mm Inlet Elbow
19 mm Uniseal
Tank Full Float, MPT Style
35 HTS-EC Tank
Kit, Mid Level Probe
Kit, Empty Level Probe
38 mm Uniseal
Kit, VG Elbow Outlet to Tank
Kit, Component Mounting Insert
Washer, .850" x .294" x .05, SS
Vacuum Generator, 12 VDC
Inlet Elbow
Item Part No. Description

16
PARTS LIST – 60 HTS-EC
60 HTS-EC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
385310945
600346604
600346795
385310931
600342781
385310946
600343023
385310938
600343689
385310947
313900100
385310948
385310949
600342932
385310935
385310939
600347167
317759012
385310635
Discharge Pump, 38 mm Adapter, Deutsch Connectors, 12 VDC
Nut, 1/4-20, SS
Washer, .625" x .281" x .05", SS
Quick-Connect 38 mm MPT Elbow
Slip Nut Seal
Diptube Kit
51 mm Uniseal®
19 mm Inlet Elbow
19 mm Uniseal
60 HTS-EC Tank
Tank Full Float, MPT Style
Kit, Empty Level Probe
Kit, Mid Level Probe
38 mm Uniseal
Kit, VG Elbow Outlet to Tank
Kit, Component Mounting Insert
Washer, .850" x .294" x .05, SS
Vacuum Generator, 12 VDC
Inlet Elbow
Item Part No. Description

17
PARTS LIST – 90 HTS-EC
90 HTS-EC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
385310945
600346604
600346795
385310931
600342781
385310950
600343023
385310938
600343689
385310951
385310952
385310953
313900100
600342932
385310935
385310939
600347167
317759012
385310635
Discharge Pump, 38 mm Adapter, Deutsch Connectors, 12 VDC
Nut, 1/4-20, SS
Washer, .625" x .281" x .05", SS
Quick-Connect 38 mm MPT Elbow
Slip Nut Seal
Diptube Kit
51 mm Uniseal®
19 mm Inlet Elbow
19 mm Uniseal
90 HTS-EC Tank
Kit, Mid Level Probe
Kit, Empty Level Probe
Tank Full Float, MPT Style
38 mm Uniseal
Kit, VG Elbow Outlet to Tank
Kit, Component Mounting Insert
Washer, .850" x .294" x .05, SS
Vacuum Generator, 12 VDC
Inlet Elbow
Item Part No. Description

18
PARTS LIST – VACUUM GENERATOR
NOTE: When reassembling pump, tighten screw (Item No. 31) , to 20 ±2 lbs., or until snug.
Overtightening will cause holes to strip.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
600340237
600343027
600342804
600342332
600344087
385310151
600340664
600343006
385230980
600347807
600342783
600342779
385310539
385310076
600342789
600342467
600346795
385310540
Pan Phillips Head Screw, #4 x 3/8", SS
Flat Washer, .312" OD x .030 Thick, SS
Motor/Switch Cover
HexWasherHeadScrew, #10-32x½",SS
Flat Washer, #10 x 5/8" OD, SS
O-Ring Kit
Bushing
Shoulder Screw, ½ x .687 x 3/8-16
Bellows Assembly
Bellows Clamp
3-3/4" Diameter Worm Gear Clamp
O-Ring, 3" ID x 3 ¼" OD
Diptube Assembly Kit (Includes Item 10)
Duckbill Valve Kit (2)
1 ½" NPT Close Nipple
¼-20 x ¾" Hex Head Screw, SS
Flat Washer, .625" OD x .281" ID x .050
Vacuum SwitchKit (includes items 16 & 17)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
600342778
600342782
600342798
385310542
600342932
385310635
600347800
600347801
600341504
600347788
600343005
600340017
600346615
600340008
385310245
385310246
600341506
600341503
O-Ring, 2" ID x 2-1/4" OD
2 ½" Diameter Worm Gear Clamp
Mounting Spindle
Vacuum Generator Tank
1 ½" Uniseal®
Inlet Elbow Kit (Includes Item 20)
Valve Nipple
Valve Adapter
Pump Body
¼-28 x 5/16" Set Screw, ½ Dog Point
Pump Eccentric
¼-28 x ½" RoundPhillipsHeadScrew, SS
Lock Washer, External Tooth, ¼"
Motor Mounting Bracket
12 VDC Motor
24 VDC Motor
Pump Top Closure
#10-12 x7/8" HexWasher HeadScrew, SS
Item Part No. Description Item Part No. Description

19
PARTS LIST – DISCHARGE PUMP
NOTE: T-Series Discharge Pump valve
adapter (item 9) has left-hand threads
(counterclockwise to tighten, clockwise
to loosen).
1
2
3
4
5
6
7
8
9
10
11
12
600340237
385640239
600341502
600342332
385310151
600340664
600343006
600347807
600340669
600347802
600341489
385230980
#4 x 3/8" Pan Head Screw
Pump Cover Kit
Pump Top Closure
#10-32 x ½" Hex Head Screw
O-Ring Replacement Kit
Bushing
Shoulder Screw, ½" x .687 x 3/8-16
Bellows Clamp
Valve Nipple
1 ½" Duckbill Valve
Pump Body
BellowsAssembly
13
14
15
16
17
18
19
20
600347788
600344470
600340017
600340008
385310245
385310246
600346615
600341503
600341113
385310250
Set Screw, ¼-28 x 5/16"
Eccentric
¼-28 x ½" Phillips Head Screw
Motor Mounting Bracket
12 VDC Motor
24 VDC Motor
¼" External Tooth Lock Washer
#10-12 x 7/8" Hex Washer Head Screw
1" x 1 ½" Reducing Adapter
Not Shown
Pump Assembly Less Motor
(includes items 3, 5, 6, 8, 9, 10, 11, 12, 19)
Item Part No. Description Item Part No. Description

20
WIRING
DISCHARGE PUMP
HOLDING TANK SYSTEM
*
*
* Indicates electrical components supplied by vehicle manufacturer.
*
*ON/OFF SWITCH