APPLICATION

• 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.

VALVE SPECIFICATIONS

• Max mains pressure 500 KPa

• Max pump pressure 600 KPa

• Flow rate >50 LPM

• Max Water Temperature 40C

• Rainwater Inlet 25mm 1” BSP F

• Mains Water in 20mm 3/4” BSP F

• Outlets 20mm 3/4” BSP F

CONSTRUCTION

• Pump body: AISI 304 Stainless steel

• Impeller: Stainless steel

• Motor Shaft: Stainless steel

• Mech seal: Ceramic / Graphite / NBR