Hyjet MHR20-750S Tank to Mains Submersible


SKU: MHR20-750s Category:

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Hyjet MHR20-750s Mains Switch Submersible

The MHR20 Series is a fully Automatic Hydraulic Rain / Mains water changeover device designed for pressure pump supply systems in harvesting rainwater for the toilet, laundry and household applications with automatic mains backup.

The MHR20 Valve is designed to operate with an electronic pressure controller with auto restart not
requiring a float switch. This design makes the MHR20 System very simple to install.

The MHR20 Valve comes with 3/4” outlet, which makes the system ideal for domestic applications. Certified to:
WaterMark ATS 5200.477 WMK 60075 Complies with AS/NZS 3500.1 when installed by a licensed plumber.
Note: Should the static mains supply be greater than 400 kPa above the supply pressure of the pump the device will not completely isolate mains water.

Motor / power: 750W
Max. flow:  115 litres / minute
Head: 36m
Pump Outlet: 25 mm
Pump Style: Submersible
Body Material: AISI 304 stainless steel motor and pump shaft
Warranty on pump: 2 Years


  • No in-tank float switch
  • Quick & Easy to install
  • Suitable for single & double storey homes
  • Automatically switches to mains in case of power failure
  • Watermarked dual check valve for back flow prevention


  • Household water supply & irrigation
  • Submersible installation

Operating Limits

  • Max. flow rate 115 L/m
  • Max. pump pressure: 600 kPa
  • Max. mains pressure: 500kPA
  • Max. flow rate: >50LT/min
  • Max. liquid temperature: 40°C
  • Rainwater Inlet 25mm 1″ BSP F
  • Mains Water in: 20mm BSP F
  • Outlet to House: 20mm BSP F
  • Voltage 240V, 50Hz


  • Pump casing: Stainless steel AISI 304
  • Motor shaft: Stainless steel AISI 304
  • Impellers: Techno polymer
  • Diffuser: Techno polymer
  • Double mechanical seal: silicon carbide – graphite / ceramic – graphite
  • Motor IP68
  • Cooled motor (by water) of Class F and thermal protection
  • Electric power cable HO7RN 10m with 3 pin

Hyjet MHR20-750 Performance Curve

MHR2-750S Install Guide



Weight 16 kg
Dimensions 65 × 22 × 27 cm

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