Xylem rule DB412 User manual

DRY BILGE PUMP WITH PANEL SWITCH
DB412
INSTRUCTION MANUAL

Purpose of This Manual
The purpose of this manual is to provide necessary information for
product installation, operation and maintenance.
User Safety
General Safety Rules
• Always keep work area clean
• Pay attention to the risks presented by gas and vapors in the work area
• Avoid all electrical dangers. Pay attention to the risks of electric shock
or arc flash hazards
• Always bear in mind the risk of drowning, electrical accidents and
burn injuries
Bilge pumps shall be mounted in accordance with the pump manufacturer
instructions, and in an accessible location to permit servicing and
cleaning of the intake and/or screening.
On boats with an enclosed accommodation compartment, an audible
alarm shall be installed indicating that the bilge water is approaching the
maximum bilge water level. Bulkhead penetrations shall be in accordance
with the requirements of ABYC H-2, Ventilation of Boats Using Gasoline, to
minimize the potential for migration of carbon monoxide from machinery
compartments containing gasoline engines to adjacent accommodation
compartments.
Potential electrical sources of ignition located in spaces containing
gasoline powered machinery, or gasoline fuel tank(s), or joint fitting(s), or
other connection(s) between components of a gasoline system, shall be
ignition protected, unless the component is isolated from a gasoline fuel
source as described in ABYC E-11.5.3.3
Exception:
1. Boats using diesel fuel as the only fuel source.
2. Outboard engines mounted externally or in compartments open to
the atmosphere in accordance with the requirements of ABYC H-2,
Ventilation of Boats Using Gasoline.
The bilge pump inlet shall be located so that excess bilge water can be
removed from the bilge at static floating position, and at maximum
conditions created by the boat’s motion, heel, and trim.
DRY BILGE PUMP WITH PANEL SWITCH
CAUTION: Read this manual carefully before installing, using or servicing
this product. Failure to follow the instructions within this manual could result in
explosion, property damage, severe personal injury and/or death.
DANGER: This product is not intended for damage control or to deal with
flooding resulting from hull damage. This product is intended to be used in Bilge
Pumping Systems for small craft with a hull length up to 24 meters, as described
within the introduction and scope of ISO 15083. Bilge Pumping Systems, as
specified in ISO 15083, are limited to normal amounts of water in an intact boat due
to spray, rain, seepage, spillage, and occasional small amounts of water shifting
from boat movements in heavy weather. Use of product in any other way could
result in flooding, catastrophic damage to craft, serious personal injury, or death.
WARNING: This pump is designed for use with fresh water and salt water
ONLY. Use with any other hazardous, caustic, or corrosive material could result
in damage to the pump and the surrounding environment, possible exposure
to hazardous substances and injury.

Robust Single Diaphragm Design
Features
• Flexible installation
• Compact and simple design
• 12 volt
• Dry running capability
• Connections for 3/4" (19mm) ports and 1.0" (25.4mm) ID hose
• Up to 4.0 US GPM (15 LPM) flow
Specifications
• Suction Lift: 9.5ft (3m)
• 3/4" (19mm) 90° thru-hull fitting included
• Control Panel Switch included
• Relevant Standards:
• ISO 8846 MARINE Ignition Protection
• ISO 8849
• ISO 15083
• ISO 10133
Performance Rating
Flow @ 12Vdc Nominal Voltage Hose Size Max Lift
H20
Max Head
H20
0ft (0m) Head 3ft (1m) Head 6ft (2m) Head
3.5 GPM (13 LPM) 4.0 GPM (15 LPM) 3.4 GPM (13 LPM) 3/4" (19mm) 9.5ft (3m) 23ft (7m)
Installation
• The Rule Bilge Pump is self priming up to 9.5ft (3m).
• Install the Rule Bilge pump in a clean, dry location. (This is not a
submersible pump.)
• Uses multi-positional ports for easy mounting of the pump.
• If mounted vertically, the motor should be above the pump head.
• Use rubber grommets provided to absorb
vibration.
• Use 3/4" (19mm) i.d. spiral reinforced hose
(with a smooth internal bore), or semi-rigid
pipework systems.
• Connect the hose to inlet and outlet of
pump using stainless steel hose clamps.
• All suction connections must be airtight and
free of sharp bends or restrictions.
• Inlet hose should run to the deepest point
of the bilge area.
• Inlet hose should be cut at an angle in the
bilge and be secured on a bulkhead or
stringer with stainless steel clamps to pick
up all of the bilge water.
• Run the discharge hose from the pump to
the 90° thru-hull.
• Install the thru-hull with a water tight sealant
and above the water line of the vessel.
• Use a 7/8" (22mm) hole saw to cut the hole
for the 90° thru-hull.
• Secure all plumbing hoses to a bulkhead or
stringer.
WARNING: All marine pumps discharging overboard must be installed
with the overboard discharge well above static and heeled waterlines.
WARNING: Do not use any Rule pump for petrol, petroleum products or
any products with a flash point below 98°F (37°C), explosion or death may occur.
HOSE
(3/4" ID)
1/8"
(3mm)
1/8"
(3mm)
Suggest 1/8"(3mm)
(minimum)

Electrical
Disconnect power before installing or servicing the pump.
All potential sources of ignition located in spaces containing gasoline
powered machinery or gasoline fuel tank(s), or joint fitting(s), or other
connection(s), between components of a gasoline system, shall be
ignition protected in accordance with the requirements of ISO 10133,
ABYC E-11, AC and DC Electrical Systems On Boats.
The electrical wiring, connections, and installation shall be in accordance
with the requirements of ISO 10133, ABYC E-11, AC and DC Electrical
Systems On Boats.
Wiring Instructions
• Make all electrical connections in dry locations; connections in humid
environments should be sealed to prevent corrosion.
• Protect the circuit with a rated fuse or circuit breaker in the red
positive (+) lead as close as possible to the power source.
• Connect the black motor wire to the negative (—) battery terminal.
• Inadequate voltage at the motor terminals when the pump is running
(not less than 10% below rated voltage at full load) due to partially
discharged batteries or insufficient cable size may result in blowing
fuses, failure to start or poor pump performance.
• Ensure sterilization of wet end before disassembly.
Plumbing
Factors that reduce the flow of a bilge pump may include but are not
limited to the following:
• The length of discharge piping (longer runs reduce flow)
• The number or radius of bends
• Excess amount of debris in water. A strainer or other means of
preventing debris from entering the pump inlet should be used to
prolong life and performance.
• The roughness of the interior surfaces of piping and fittings (smooth
bore hose is best)
• The reduction (hose restriction) in cross-sectional area of discharge
system components such as check valves and thru-hulls
The discharge may be located below the maximum heeled waterline if the
discharge line is provided with both of the following:
WARNING: If the fuse fails repeatedly do not fit a heavier fuse or bridge the
fuse terminals with silver paper or metal wire. Failure to observe this instruction
may result in a fire hazard due to overheating of cables.
Pump
Power
Control
Switch
Fuse
Black
Red
Model No. Voltage Max
Current
Max
Fuse Size
Wiring Size*
AWG mm2Max Length
50880-1000 12V 8A 10A 14 2.5 30ft (9m)
*for longer installations, fit thicker cables
CAUTION: Disconnect power from the system before working on the
unit to avoid personal injury, damage to the surrounding environment and/or
damage to the unit.
CAUTION: Always install proper fuse size to prevent damage to product
should a short occur. Failure to install proper fuse could increase risk of pump
malfunction potentially resulting in personal injury and/or fire hazard.
CAUTION: Keep all wire connections above the highest water level. Wires
must be joined with butt connectors and a marine grade sealant to prevent
wire corrosion.

• A seacock installed in accordance with the requirements of ABYC H-27,
Seacocks, Thru-Hull Connections, and Drain Plugs, and
• A vented loop to prevent siphoning into the boat. A check valve shall
not be used for this purpose.
If the discharges of several pumps are manifolded to discharge through a
single thru-hull fitting, the system shall be designed so that the operation
of one pump will not back feed another pump, and the simultaneous
operation of each pump will not diminish the pumping capacity of the
system. A check valve shall not be used in the discharge manifold system.
During the winterization of a vessel, it’s recommended that you remove
the check valve and drain any residual water from the plumbing.
Periodically remove, clean and inspect bilge pump, check valve and its
surroundings for damage or debris that may reduce the performance of
the pump.
Operation
The dc motor is suitable for intermittent duty and should not be run for
more than 30 minutes continuously.
Rotation of Pump Head
1. Push down on clip and remove end cover
2. Internal bolt heads now exposed
3. Undo all four mounting bolts
4. Remove bolts and grasp motor unit firmly
5. Rotate pump head to desired position
6. Example of pumps rotational capabilities
7. Replace all 4 internal bolts and secure tightly
8. Replace end cover
1
3
5
7
2
4
6
8
All mounting holes must be sealed with a marine
grade sealant to prevent water intrusion.
Install to ABYC H-22 and E-11

Rotation of Ports
1. Undo clamp using allen key
2. Remove clamp
3. Rotate port unit to desired location
4. Example of pumps rotational capabilities
5. Replace clamp and tighten until firmly secure
Maintenance
Check all electrical connections periodically, particularly in salt water
areas. Corrosion can cause loss of performance or non-operation in
extreme cases. The motor should be protected with a corrosion inhibiting
spray and any rust should be removed and the motor repainted.
1
3
5
2
4
6
WARNING: Always disconnect pump from power supply.

Exploded View
Part Numbers
Model Description Voltage Fuse Sizes
DB412 Complete Kit 12V 10A
50 Panel Switch 12V
Key Description Quantity in Kit
1Bracket
2Bush
5Con Rod
6Con Rod Plate
9Hex Head Screw
11 Motor Assembly
13 Shower Drain & Bilge Pump Chamber
17 Washer
Bilge Pump Service Kit
7Cover 1
8Diaphragm 1
10 Hex Head Screw 4
12 Screw Recessed Pan Head 1
14 Shower Drain & Bilge Pump Joker Valve 2
15 Shower Drain & Bilge Pump Port 2
18 Washer 1
Clamp Kit
3Clamp Bottom 1
4Clamp Top 1
16 Socket Head Screw 2
Service Kits
Model Description
SK880 Service Kit - Bilge Pump
50886-1000 Clamp Kit
61 Thru Hull Fitting - 3/4" Right Angle

inches (mm)
2.25 (57. 2)
2.00 (50.8)
2.00
(50.8)
1.00
(25.4)
0.03
(.8)
.125 (3.2)
1.12
(28.6)
6.
2 (158.4)
5.
2 (131.8)
11.6 (293.4)
3.5 (89)
3.5 (89)
2.7 (69.8)
Dimensional Drawing
Discover Rule at www.xylem.com/rule
Warranty: All products of the company are sold and all services of the
company are offered subject to the company’s warranty and terms and
conditions of sale, copies of which will be furnished upon request
© 2020 Xylem. All rights reserved. Rule is a trademark of Xylem
or one of its subsidiaries.
950-0548 Rev. B 05/2020
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