Watts AMES Deringer 20 User manual

Installation, Operation and
Maintenance Manual
IOM-A-Deringer 20/30_2.5-4
Deringer™20/30
Double Check Valve/Double
Check Detector Assemblies
Size: 2½" – 4"
WARNING
!
Read this manual BEFORE using this equipment.
Failure to read and follow all safety and use information can
result in death, serious personal injury, property damage, or
damage to the equipment.
Keep this manual for future reference.
You are required to consult the local building and plumbing
codes prior to installation. If the information in this manual
is not consistent with local building or plumbing codes,
the local codes should be followed. Inquire with governing
authorities for additional local requirements.
WARNING
!

2IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
This list is the recommended tools for installation. Other
versions of the same tool can be used. For example, allen
wrenches instead of allen drive sockets.
Tools Required
T45 Torx Wrench Wood Block 2" x 4" x 5"
Wood Block 1" x 2" x 16"
#2 Phillips Head Screwdriver #2 Flathead Screwdriver 5/8" Ratchet Wrench
Adjustable Wrench Deringer Test Cock Wrench Slip-Joint Pliers

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IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
Closing Shutoff Valves Prior to Maintenance
1. Slowly rotate shutoff valve #2 handle clockwise to the closed
position. Flag perpendicular to flow (A).
2 Slowly rotate shutoff valve #1 handle clockwise to the closed
position. Flag perpendicular to flow (A).
NOTICE
When yellow/orange position indicator flags are parallel with the flow of water
the shutoff valves are in the open position. Before doing any maintenance be
sure the yellow or orange flow indicators (flags) are perpendicular to the flow
of water valve body indicating shutoff valves are in the closed position (A).
FLOW
FLOW
Opening Test Cocks and Bleeding All Pressure
from the Line Before Maintenance
NOTE: valve is still under pressure. When opening test cocks,
water will be released. Take precautions to ensure discharging
water does not damage the surrounding area/equipment or
create an unsafe condition.
1. DO NOT OPEN Main test cock number 1, as it is still
subject to line pressure.
2. Using the DeringerTM test cock wrench or a small adjustable
wrench open (A) main test cock number 4.
(Test cock is open when wrench flats are parallel to water
flow through test cock)
3. Deringer 30 only: Using a #2 flathead screwdriver open
bypass test cock number 2. (Test cock is open when screw-
driver slot is parallel to water flow through test cock (B))
4. Using the Deringer test cock wrench or a small adjustable
wrench open main test cock number 3.
5. Deringer 30 only: Using a #2 flathead
screwdriver open bypass test cock
number 1.
6. Using the Deringer test cock
wrench or a small adjustable
wrench open main test
cock number 2.
FLOW
BB
A
A
A
ClosedOpen
Bypass Test CockMain Test Cock
Closed Open Closed Open

4IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
Removing Access Port Cover Plate
B
C
A
A
1. Using a 5/8" ratchet wrench loosen all six
bolts on the access port cover plate (A).
2. Remove bolts and store in a safe place. If
lost, tapered bolts must be replaced with
like Deringer cover bolts and cannot be
substituted with standard bolts
3. Remove access port cover plate (B).
Do not remove access port O-ring (C).
Removing the First Dual-actionTM Check Module
FLOW C
A
1. Use a T45 torx wrench to loosen the check retainer
bolts on both sides of the valve body (A). Do not com-
pletely remove check retainer bolts from valve body.
Loosen the bolts until the ends of the bolts are flush
with the inner wall of the valve body (B).
2. Insert a flathead screwdriver between the inner valve
body and the first check module flange (C), gently push
the first check module in the downstream direction until
the first check module can easily be removed from the
access port by hand.
B
Removing the Second Dual-action Check Module
FLOW
C
A
1. Remove 1st check prior to removing 2nd check as
described above.
2. Use a T45 torx wrench to loosen the check retainer
bolts on both side of the valve body (A). Do not
completely remove check retainer bolts from valve
body. Loosen the bolts until the ends of the bolts are
flush with the inner wall of the valve body (B).
3. Insert a flathead screwdriver between the inner valve
body and the second check module flange (C),
gently push the second check module in the upstream
direction until the second check module can easily be
removed from the access port by hand.
B
A

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IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
Deringer 30: Disassembly and Maintenance of Bypass Check Valve
A
C
B
A
D
Part 1
1. Use an adjustable wrench to rotate check cover (A) counterclockwise
to remove.
2. Examine cover plate O-ring (B) for damage or fouling.
3. Remove spring (C).
4. Remove check poppet assembly (D) and examine for damage
or fouling.
5. Examine seat cage, located inside the bypass check valve body,
for damage or fouling to the sealing seat. Do not remove unless the
seat cage is being replaced.
6. Reverse the order of above instructions to reassemble bypass
check Valve.
A
Part 2
1. To replace a damaged red silicone poppet disk, use a
#2 phillips head screwdriver to remove the disk retaining
screw (A).
2. Remove disk retaining washer (B).
3. Use a flathead screwdriver to remove the gasket from
poppet cavity (C).
4. Install new red silicone poppet disk (D).
5. Reverse the order of the above instructions to reassemble
check poppet assembly.
6. Reverse the order of the instructions on the previous page to
reassemble bypass check assembly.
A
AC
B
D
Disassembly and Maintenance of Bypass Check Valve (continued)

6IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
Deringer 30: Removing Bypass Meter
1. Using the ball valve handles close the #2 bypass ball valve
(A) and then #1 bypass ball valve (B). (Ball valve is closed
when “T” handle is perpendicular to water flow through
ball valve).
2. Using a #2 flat head screw driver open bypass test cock
#2 (C) and then open bypass test cock #1 (D). (Test cock is
open when screw driver slot is parallel to water flow through
test cock).
3. Using large adjustable pliers or a wrench, unscrew and
retract bypass meter coupling nuts (E) . Remove the
gaskets (F) on both sides of bypass meter.
4. Gently remove bypass meter (G) from line. It is OK if the
bypass fittings move slightly during the removal process.
5. Reverse order of above instructions to reinstall bypass
meter. Remember to install gaskets (F) before threading
meter coupling nuts into place.
B
C
E
E
GF
E
FLOW
D
A
Maintenance of First Dual-action Check Module
1. Use a #2 phillips head screwdriver to remove tower
screws (A) from the first check seat (B) the double
torsion spring is captured (C) and does not to be retained
during maintenance.
2. After removing the tower screws (A) examine the elastomer
disk (D) and check seat (E) for fouling or damage.
3. Should elastomer disk (D) need replacement unscrew disk
retainer screws (F) and remove disk retainer (G). Carefully
remove and replace elastomer disk (D). When replacing
elastomer disk (D) be certain that no air, water or debris is
trapped in the clapper (H) cavity behind the elastomer disk (D).
4. Reverse the order of the above instructions to reassemble
check.
• Elastomer disk must be flat in clapper (H) cavity before
tightening disk retainer screws (F).
• Do not cross thread disk retaining screws (F).
F
G
E
D
D
H
B
CA

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IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
Maintenance of First Dual-action Check Module (Continued)
NOTICE First Check Tower Bosses and Spring Arms Face Up
Orient seat protrusions as shown
Tower Bosses
Spring Arms
The diagram on the right shows the correct orientation of the
first dual-action check module when being re-attached to the
seat. In order to maintain the performance of the valve pay
attention to the proper orientation of the check module.
Maintenance of Second Dual-action Check Module
1. Use a #2 phillips head screwdriver to remove tower screws
(A) from the second check seat (B) the double torsion
spring is captured (C) and does not to be retained
during maintenance.
2. After removing the tower screws (A) examine the elastomer
disk (D) and check seat (E) for fouling or damage.
3. Should elastomer disk (D) need replacement unscrew disk
retainer screws (F) and remove disk retainer (G). Carefully
remove and replace elastomer disk (D). When replacing
elastomer disk (D) be certain that no air, water or debris is
trapped in the clapper (H) cavity behind the elastomer disk (D).
4. Reverse the order of the above instructions to reassemble
check.
• Elastomer disk must be flat in clapper (H) cavity before
tightening disk retainer screws (F).
• Do not cross thread disk retaining screws (F).
G
D
H
B
C
A
E
DF
NOTICE Second Check Tower Bosses and Spring Arms Face Down
Orient seat protrusions as shown
Tower Bosses
Spring Arms
The diagram on the right shows the correct orientation of the
second dual-action check module when being re-attached to
the seat. In order to maintain the performance of the valve pay
attention to the proper orientation of the check module.

8IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
Installing Second Dual-action Check Module
1. Insert second check module (A) into access port (B) with second
check towers (C, pictured inside the valve body) pointing down-
stream. Push second check module (A) downstream into valve seal-
ing ring (D) until check O-ring (E) rests against valve sealing ring (D).
Push second check module (A) into its fully seated position by hand.
2. Alternatively place 2"x4" piece of wood cut to 5" length (F) against
the backside of the second check seat ring (G). Using a 1"x4" piece
of wood cut to 16" length (H) as a lever between access port wall
the 2"x4" (F) gently move the second check module (A) into its fully
seated position.
3. Be certain second check module (A) is fully seated and check O-ring
(E) is NOT “fish mouthed” or damaged.
4. Tighten the second check retaining screws (I) ONLY AFTER the
first check module (A) has been installed.
The second check module must be fully seated to ensure
retainer screws do not bind against check seat. Binding
retainer screws against check seat will result in permanent
damage to second check modules.
WARNING
!
FLOW
D
A
B
G
Not BindingBinding
H
F
I
E
C

9
IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
Installing First Dual-action Check Module
1. Insert first check module (A) into access port (B) with first check
towers (C) pointing downstream. Push first check module (A)
upstream into valve sealing ring (D) until check O-ring (E) is
resting against valve sealing ring (D). Push first check module
(A) into its fully seated position by hand.
2. Alternatively, using a piece of 1"x4" wood cut to 16" length
(F) as a lever between the second check seat (G) and the first
check towers (C), push the first check module (A) into its fully
seated position.
3. Be certain first check module (A) is fully seated and check
O-ring (E) is NOT “fish mouthed” or damaged.
4. Now fully tighten the first and second check retaining
screws (I) .
The first check module must be fully seated to ensure
retainer screws do not bind against check towers. Binding
retainer screws against check towers will result in permanent
damage to first check modules.
WARNING
!
FLOW
Not BindingBinding
C
A
B
E
F
G
D
NOTICE
Recommended torque for the check retainer bolts is 50 ft. lb.
I
Installing Access Port Cover
1. It is best to never remove the access port O-ring (A). Should the access port
O-ring (A) become dislodged, simply insert it back into access port groove (B).
2. Slide the Access Port Cover (C) into place being certain that access port
O-ring (A) does not become dislodged during the process.
3. Insert cover bolts (D) into tapered cover holes (E).
4. Use ratchet wrench (F) to sequentially tighten all cover bolts (D) alternating from
one side of the valve to the other.
A
B
E
C
F
D

10 IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
Close Test Cocks and Double Check All Closing/Sealing Mechanisms
1. Using the Deringer test cock wrench or a small adjustable
wrench slightly close main test cocks number 2, 3 and 4
(A) to allow excess air to be released before closing the test
cocks completely.
2. Deringer 30: Using a #2 flathead screwdriver close bypass
test cock number 1 and 2 (B). (Test cock is closed when
screwdriver slot on stem is perpendicular to water flow
through test cock)
3. Use the “T” handles to open bypass ball valve number 1 (D)
and then open bypass ball valve number 2 (C). (Ball valve is
open when “T” handle is parallel to water flow through
ball valve)
4. Double check to be certain of the following:
• All cover bolts are tightened (E)
• Deringer 30: Bypass check valve cover is tightened (F)
• Deringer 30: Bypass meter coupling nuts are tightened (G) FLOW
A
A
B
BE
F
G
D
Open
Open
Closed
Closed
C

11
IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
Open Shutoff Valves to Make Backflow Preventer Functional
1. Slowly rotate the number 1 shutoff valve operation handle
(A) counter clockwise to the open position. (Shutoff valve is
open when yellow/orange position indicator flags are parallel
to the mainline water flow)
2. As the valve fills with water air will be pushed through the
test cocks. Once a steady flow of water is released from the
test cocks close in order (2, 3 then 4. Test cock is closed
when wrench flats on stem are perpendicular to water flow
through test cock).
3. Slowly rotate the number 2 Shutoff valve operation Handle
(B) counter clockwise to the open position.
FLOW
C
C
B
NOTICE
Yellow/orange position indicator flags must be parallel to
mainline water flow for backflow valve to be functional (C).
A

12 IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts
Step 1: Using wire cutters, cut the wires coming out of the
gearbox as close to the gearbox as possible.
Step 2: Use a piece of thread seal tape to seal the threads on a
½" NPT plug
Step 3: Using an allen wrench, install and tighten the ½" NPT
plug into the same threaded hole where the wires were
previously cut.
NOTICE
If a Deringer is going to be installed outdoors and the tamper switches will not
be wired into the fire alarm system, the wires will need to be cut and a plug
will need to be installed to protect the internal components of the gearbox.
Limited Warranty: Ames Fire & Waterworks (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date
of original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER
WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special
or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from
labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control.
This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the
above limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to
determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.
USA: Backflow T: [phone] • F: [phone] • AmesFireWater.com
USA: Control Valves T: [phone] • F: [phone] • AmesFireWater.com
Canada: T: [phone] • F: [phone] • AmesFireWater.ca
Latin America: T: (55) 4122-0138 • AmesFireWater.com