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Newton NP Effluent Water Pumps

A range of automatic effluent water pumps for the removal of dishwasher, washing machine, bath shower or other waste is to be removed from the sump.

The NP400W is a 2” discharge pump. If a non-return valve is required, Newton recommends the V3 (a 2” free passage check valve). For increased duty in a twin pump system, separate discharge lines should be used. The NP750W is supplied with a one-way check valve and is suitable for 50 mm or 63 mm (via an adapter) discharge pipes. For increased duty in a twin pump system, separate discharge lines should be used.

The NP400W can be used with Newton Victron Power Inverter 12/1200/50 to give continual pumping during power outage, while the NP750W is compatible with the Newton Victron Power Inverter 12/3000/125.

Features and benefits:

  • Adjustable float arrangement that cannot be fouled by hardened soaps, effluent and grease.
  • Fluid temperature range: 0–40°C.
  • Semi-vortex pump design.
  • Single phase power supply.

General information

Body: Stainless steel and glass fibre plastic

Shaft: Grade 304 (1.4301) stainless steel

Shaft seals: Silicon carbide, carbon ceramic

Uniclass 2015
Pr_70_55_76_62 Private packaged pumping stationsPrimary

R12/135 Private packaged pumping stations and pressure pipeline system

R18/310 Private packaged pumping stations

Specification data - Private packaged pumping stations
Product Reference

Newton NP400W Effluent Pump (P4)

Medium head and medium performance pump.

Newton NP750W Effluent Pump (P8)

High head and high performance pump.


2” pressure rated

For effluent removal.

Power converter

MultiPlus 12/1200/50 (BB2)

Battery back-up facility for pumps of 400 W.

MultiPlus 12/3000/125 (BB3)

Battery back-up facility for pumps of 750 W.

Standby batteries

Northstar NSB 100FT (BB21)

Northstar NSB 190FT (BB22)

High water level alarm

9 V battery (PA50)

Switch not suitable for regular contact with sewage.

Accessories/ Other requirements

Not required

Newton High Level Alarm (PA50)

Newton Text and Speech Dialer (PA5)

Can send either text or voice messages to up to five designated phones should an alarm condition occur.

Standard product features

Size (l x w x h):

  • NP400W: 236 x 173 x 374 mm.
  • NP750W: 236 x 173 x 394 mm.

Weight (dry):

  • NP400W: 7.6 kg.
  • NP750W: 9.9 kg.


  • Body: Stainless steel and glass fibre plastic.
  • Shaft: Grade 304 (1.4301) stainless steel.
  • Shaft seals: Silicon carbide, carbon ceramic.

Technical characteristics:

  • Pump design: Semi-vortex.
  • Outlet: NP400W: 2” BSP Female; NP750: 50 mm.
  • Maximum pumping head: NP400W: 9.5 m; NP750W: 12.5 m.
  • Maximum flow rate: NP400W: 270 L/min; NP750W: 355 L/min.
  • Flow rate (at 4 m head): NP400W: 220 L/min; NP750W: 320 L/min.
  • Soft solid passage: 35 mm.
  • Float switch: Twin teardrop.
  • Lowest/ Stop water level: 115 mm.
  • Fluid temperature range: 0–40°C.
  • Power supply: Single phase.
  • Motor output: NP400W: 400 W; NP750W: 750 W.
  • Starter: Capacitor type.
  • Vortex impellor speed: NP400W: 2813 rpm; NP750W: 3000 rpm.

Product Options

Power converter:

The Victron Inverter/ Charger units draw 12 V power from a single or a bank of 12 V batteries which is inverted into clean, pure sine wave, 230 V power to ensure that the Newton Pump continues to operate even during a power outage.

Control panel:

The panel features interface for use with Newton battery back-up and telemetry systems as well as connections to whole house alarm and monitoring systems. The control panel PCB is split with two separate circuits, ensuring that pumping will continue even if one of the control circuits should fail.

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