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Rule Pumps Automatic 12 Volt DC Bilge Pump, 500 GPH 25SA (D)

Item#: RUL-PMP-25SA
Product Available Availability:Usually ships the next business day
Rule Pumps Automatic Submersible 12 Volt DC Bilge Pump, 500 GPH  25SA (D)<br>
Reg. $120.48
Sale: $79.05

Pump design eliminates the need for a separate float switch to activate this RULE bilge pump. When power is supplied the start/stop mode for this unit is completely automatic. Pump checks for water every 2-1/2 min. by turning ON for a second and measuring the load against the impeller. If water is present the pump turns ON and remains in operation until the water is removed. Thereafter the pump maintains its 2-1/2 min. check cycle.


Automatic Operation: Pump turns on and checks for water approximately every 2-1/2 minutes. If resistance (water) is found, it will run for as long as water is present. When all the water is pumped out, the pump shuts off and returns to its 2-1/2 minute test cycle. Amp Draw During Automatic Check: 0.5 Amps in a 24 hour period Manual Operation: The pump can be started at any time by disconnecting it from the power source, waiting for 5 seconds and reconnecting to the power source Amp Draw @ 12.0 Volts: 1.9 Amp Draw @ 13.6 Volts: 2.5 Fuse Size: 2.5 amps Discharge Opening: 3/4" Discharge Finish: Barbed Housing Material: ABS Strainer Material: ABS Impeller Material: Nylon Shaft Material: Stainless Seal Material: Nitril/Teflon Temperature Limit: 200 F Fluid Capabilities: Bilge Water Typical Life: 1500 hours Wire Length: 29" Wire Gauge: 16 gauge Height: 3-1/2" Width: 2-3/8" Depth: 2-3/8" Weight: 9 oz Certifications: NMMA Type Accepted Equipment # 704213, IMCI Certified - ISO 8849, CE Certified, UPC Code 0-42237-08313-5

Capacity # 25SA Automatic Pump In Gallons Per Hour
Operating Voltage Head In Feet
0' 3.35' 6.7'
Gallons Per Hour
12 VDC 480 310 180
13.6 VDC 500 360 260

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Questions & Answers

Through advanced electronic technology, Rule Automatic Bilge Pumps eliminate the need for a separate switch to activate the pump. Once power is supplied, starting and stopping is completely automatic. The pump checks for water every 2-1/2 minutes by running for a second and measuring load against the impeller. If water is present, the pump remains on until the water is removed. Thereafter it resumes its 2-1/2 minute check cycle. The pumps feature two positive leads, one which is automatic and one which can manually override the pump and turn it on at any time.
Press strainer base fingers inward and lift pump to remove from strainer. Mount the strainer to your boat with stainless steel screws. On a fiberglass boat you may prefer to bond a wooden block in place and then mount the strainer. To assemble pump to strainer, align the clasps to the strainer fingers and press pump down to snap lock in place. To mount this pump to a transom or a side surface, use Rule Model 66 vertical mounting bracket.
Normal installation requires 16-gauge wire. For installations over 25 feet from battery, use 14-gauge wire.
Black pump wire connects to negative (-) side of the battery. Brown pump wire connects to the automatic side of the switch. Brown with white stripe wire connects to the manual side of the switch.
Install recommended size fuse in the positive (+) Brown wire.
Model 500 GPH uses 2.5 amps fuse; 800 GPH uses 5.0 amp fuse and 1100GPH uses 5.0 amp fuse
Pump are not equipped with a fuse. Always install the recommended fuse size in the (+) power line. Failure to install proper fuse could result in personal injury and/or fire hazards.
Wire connections should be sealed with Marine Grade Silicone Rubber, Liquid Electrical Tape, or Sudbury Elastomeric Marine Sealant to prevent corrosion. When eliminating the manual override option ( 2-wire installation)
When using two wire installations, eliminating the manual override option, the 3rd wire (Brown/White) must be sealed and secured high above the bilge water.
Bilge Pumps must be plumbed to a thru-hull fitting that remains above the water line at all times. On sailboats, locate the thru-hull fitting high enough on the center of the transom to be above the anticipated water line. To prevent water traps that can cause your pump to airlock the hose must rise continuously from the pump to the thru-hull fitting with no clips where water can collect. Attach the discharge hose to the pump and thru-hull fitting with stainless steel hose clamps.

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