Shop Macerator Pumps at West Marine
Macerator pumps play a crucial role in marine sanitation systems by grinding and discharging waste from onboard holding tanks. Designed to handle solid and liquid waste, these pumps are essential for boaters who need to empty tanks efficiently and legally while offshore. West Marine carries a full lineup of 12V and 24V macerator pumps, replacement motors, impellers, seal kits, and accessories from trusted brands like Jabsco, Shurflo, Groco, Raritan, and Sealand.
Whether you're outfitting a new waste system or replacing a failed unit, you’ll find compact, high-capacity macerators built for marine environments. Many models offer sealed motors, dry-run protection, and corrosion-resistant components. We also carry repair parts to extend the life of your existing pump without replacing the entire unit.
Key Features of Marine Macerator Pumps
Most marine macerators combine a chopping blade and an impeller in a single housing. These pumps draw waste from a holding tank, reduce solids, and push contents through discharge plumbing. Common applications include toilet systems, fish box drains, and gray water tanks. Available models vary in flow rate, voltage, and amp draw to suit your boat’s electrical system and tank size.
Macerator Pump Replacement Parts
Routine maintenance is key to keeping macerator pumps performing. West Marine offers impellers, motors, O-ring kits, and seal sets to restore functionality. These parts are matched to specific pump models, so check compatibility before ordering.
Macerator Pumps FAQ
A macerator pump grinds up solid waste and pumps it overboard or into a shore facility when legal to do so. It is used primarily in marine sanitation systems to manage waste from holding tanks.
Only if you're in compliance with local, state, and federal laws. In U.S. waters, overboard discharge of untreated waste is illegal within three nautical miles from shore. Check regulations before use.
Most marine macerator pumps operate on 12V DC or 24V DC systems. Be sure to match the pump voltage to your boat’s electrical setup to avoid damage or performance issues.
Flush the system with clean water regularly and avoid pumping foreign objects. Replace impellers and seals as needed. Periodic cleaning and winterizing prevent clogs and freeze damage.
If your pump runs but doesn’t discharge, makes unusual noise, trips the circuit, or leaks, it may be time to service or replace the unit. Impeller wear and motor failure are common causes.
Common accessories include replacement impellers, seal kits, mounting grommets, and motors. These parts help extend pump life and are often available for brand-specific models.
Yes, most macerator pumps are self-priming up to a certain lift height. However, they must not run dry for extended periods, which can damage the impeller or motor.
Flow rates vary by model, typically between 10–13 GPM (gallons per minute). Choose based on holding tank size and discharge needs. Faster pumps empty tanks more quickly but may use more power.
Yes. West Marine stocks replacement motors, impellers, and seal kits for many Jabsco, Shurflo, and Sealand models. This allows for targeted repairs rather than full pump replacement.
Flush the system with fresh water, then run non-toxic antifreeze through the lines and pump. Be sure to operate the pump briefly to circulate the antifreeze and protect internal components from freezing.
