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Johnson Waste Macerator Pump 12V
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Johnson Macerator Waste Pump (12V / 37 LPM / 1-1/2" In / LH 1" Out)

Part No. 507412

£133.56 You pay £133.56 Incl VAT You pay £111.30 Excl VAT

RRP £148.40 £123.67

Save £14.84 (10.0%) Save £12.37 (10.0%)


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Brand Johnson
Model 10-24453-04
Series TA3P10
Voltage 12V DC
Fuse 20A
Amps 15A Maximum
Inlet 38mm (1-1/2") Hose Barb / 1-1/2" BSP
Outlet Left Hand 25mm (1") Hose Barb
Flow Rate 37 LPM (9.8 US GPM)
Self Primes up to 0.8 Metres (2.7ft)
Length 230mm (9")
Width 108mm (4.25")
Height 82mm (3.2")
Certification / Approvals CE Listed, Ignition protected motor (ISO 8846)

The Johnson TA3P10-19 macerator pump is specifically designed to dispose of toilet waste using a rotary cutter system and a self-priming flexible impeller pump. The pump is suitable for use with manual toilet pumps and toilets without a macerator fitted.

The Johnson macerator waste pump should be installed directly on the toilet bowl discharge outlet or as close as possible to the holding tank so it can be effectively and entirely emptied overboard.

With a phenol plastic body and a thermoplastic polyester housing, the macerator pump is suitable for use within the marine environment. The waste pump also features a stainless steel shaft as well as a nitrile impeller.

Johnson offer the following wiring advice to give maximum performance, worth considering when purchasing the wiring for this macerator pump:

Wire Size

Maximum Wire Length (12V)

Maximum Wire Length (24V)

1.5mm² (#16 AWG)



2.5mm² (#14 AWG)



4mm² (#12 AWG)



6mm² (#10 AWG)


10mm² (#6 AWG)


16mm² (#4 AWG)


Johnson Macerator Pump Features & Benefits

  • Ignition protected motor (ISO 8846).
  • Easy to install mounting bracket.
  • Very energy efficient pump.
  • Rotary cutter.
  • Self priming up to 0.8m.
  • CE Listed.

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