Rule

(107 products)

Rule Pumps (a Xylem brand) has set the industry standard for submersible bilge pumps for over 50 years. Rule’s lineup is defined by "Smart" automation and high-efficiency motors that deliver more water flow with lower amperage draw.

At Anchor Express, we stock the full Rule catalog, featuring the newly redesigned submersible series, the low-profile LoPro, and the all-in-one Rule-Mate.

1. Submersible Bilge Pumps (Newly Redesigned)

The core Rule submersible line has been upgraded with several patent-pending features for 2026:

Higher Flow, Lower Amps: Optimized impellers deliver up to 10% more GPH without increasing battery drain.
Thermal Cut-Off (TCO): A critical safety update—if the pump is jammed by debris, it will automatically shut down to prevent the motor from overheating and potentially causing a fire.
Backflow Prevention: New models include a tricuspid check valve that prevents water in the hose from flowing back into the bilge, reducing odors and "nuisance" pump cycling.
Hidden Air Vents: Integrated into the pump body to prevent "air locking" in challenging plumbing runs.

2. Rule-Mate® Series (All-In-One)

The Rule-Mate is the premier choice for boats where space is limited. It combines the pump and a solid-state water sensor in a single, compact housing.

No Float Switch Needed: The internal sensor detects water levels automatically.
Eco-Friendly Technology: The sensor only detects the dielectric constant of water. It will not pump oil; if a fuel or oil spill occurs in the bilge, the pump stays off to prevent environmental contamination.
Back-Up Mode: If the sensor is fouled by debris, the pump enters a "safety cycle" (turning on every 2.5 minutes) to ensure your boat stays protected until the sensor is cleaned.

3. LoPro™ Series (Low Profile)

For modern boats with shallow bilges (like ski boats or high-performance center consoles), the LoPro is the only solution that fits.

Ultra-Slim Design: At just 2.25" high, it can be mounted horizontally or vertically.
Adjustable Sensing: The LP900S model allows you to choose between two water-start levels (2" or 1.3") simply by rotating the motor cartridge.
360° Rotating Discharge: The discharge nozzle swivels 180° and the hose fitting swivels 360°, allowing for perfect plumbing alignment in tight stringer spaces.

Rule Marine Pumps are the world’s most trusted choice for reliable water removal. At Anchor Express, we offer the complete Rule collection, including high-capacity submersible pumps, automated Rule-Mate units, and the LoPro series for tight spaces. Engineered for durability and safety, the latest Rule pumps feature built-in thermal protection, anti-airlock venting, and optimized impellers for maximum efficiency. Whether you need a 360 GPH pump for a small skiff or a massive 4000 GPH unit for an offshore yacht, trust Rule to keep your bilge dry and your vessel safe.

Selection Tip: Automatic vs. Computerized

Automatic (Rule-Mate): Remains completely OFF until water touches the sensor. Best for boats kept on moorings or at docks for long periods to save battery.
Computerized (Standard Auto): Turns on for 1 second every 2.5 minutes to "feel" for resistance on the impeller. Best for boats with active charging systems or high-vibration environments where a sensor might get "tricked."