12V RV and marine macerator pump designed to shred and transfer toilet waste from a holding tank or sewage line, with 10 GPM flow rating, 1-1/2" inlet, and 1" discharge outlet.
The Johnson Pump 10-24453-01, also referenced as TA3P10-1907 or TA3P10-19, is a 12V macerator pump designed for RV and marine waste transfer applications. It uses a rotary cutter to help shred toilet waste before pumping it into or out of a holding tank.
This pump is commonly used in sanitation systems where waste must be moved through a discharge hose from a holding tank outlet or toilet discharge line. Its compact 12V design, built-in thermal protection, and ignition-protected motor make it a practical replacement option when the existing system uses compatible plumbing, electrical specs, and mounting space.
Designed for RV and marine toilet waste / holding tank applications
Helps shred waste before pumping into or out of the holding tank
Runs on standard 12-volt DC power used in many RV and marine systems
Rated up to approximately 10 gallons per minute at listed test conditions
Manufacturer specifications list this pump with a 1-1/2" inlet and 1" outlet. The inlet is commonly listed as 1-1/2" hose or 1-1/2" NPT, while the discharge outlet is listed for 1" hose. Verify your existing pump label, inlet/outlet size, hose size, wiring, fuse protection, and available mounting space before ordering. Do not assume this pump will replace another macerator pump based on voltage alone.
Before Starting: Disconnect 12V power and confirm the waste system is safely drained, depressurized, and clean enough to service. Wear appropriate protective equipment when working with black tank or sewage plumbing. Basic Installation Steps: 1. Confirm Fitment: Compare the existing pump part number, voltage, inlet size, outlet size, hose type, wiring, fuse size, and mounting space. 2. Disconnect Power: Turn off 12V power to the pump circuit before removing wiring or plumbing. 3. Prepare Waste System: Drain and flush the holding tank as thoroughly as possible before service. 4. Remove Existing Pump: Disconnect the inlet and outlet hoses, wiring, and mounting fasteners from the old pump. 5. Position New Pump: Mount the pump as close as practical to the holding tank discharge outlet or bowl discharge outlet, following the correct flow direction. 6. Connect Plumbing: Attach the compatible 1-1/2" inlet and 1" discharge hose/fittings using proper sanitation-rated components and clamps. 7. Wire the Pump: Connect to a properly protected 12V DC circuit using the recommended fuse size and correct polarity. 8. Check Valves: Make sure required waste valves are open before testing the pump. 9. Test Operation: Briefly test the pump with liquid present, checking for leaks, flow, abnormal noise, overheating, or electrical issues.
Package Contents: • 1 Johnson Pump 10-24453-01 TA3P10-1907 / TA3P10-19 12V macerator pump • Integrated rotary cutter pump assembly • Mounting bracket / pump body components as supplied by manufacturer NOT Included — May Also Need: • 1-1/2" inlet hose or compatible inlet fitting • 1" discharge hose • Hose clamps • Wiring, switch, fuse holder, or circuit protection components • Sanitation fittings, adapters, valves, or sealant • Tank fittings or plumbing components not supplied with the pump • Installation tools or waste system service supplies This listing is for the macerator pump only unless otherwise stated. Confirm required hoses, fittings, wiring, and installation supplies before ordering.
To confirm compatibility before ordering, have the following ready: • Existing pump brand and part number • Photos of the existing pump label and plumbing connections • Voltage and fuse/circuit information • Inlet and outlet hose measurements • Whether the inlet uses hose barb, threaded connection, or adapters • Available mounting space and pump orientation • RV or boat year, make, model, and waste system layout if available Why this matters: Macerator pumps can look similar while using different port sizes, outlet styles, amperage ratings, mounting dimensions, or plumbing adapters.
Match this pump by part number, voltage, inlet size, outlet size, fuse requirement, plumbing style, and available mounting space. Do not select by voltage or general appearance alone.
If pump issues continue after installation, check power supply, fuse size, wiring, valves, hose routing, tank outlet condition, and plumbing compatibility before replacing additional components.
This pump is intended for compatible RV and marine waste transfer applications only. Do not run the pump dry, do not operate against a closed valve, and do not use this pump for gasoline, fuel, solvents, freshwater supply, drinking water, or other unintended fluids. Always disconnect power before servicing and follow proper sanitation procedures when working with sewage or black tank plumbing.