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Automatic mains backup

Ensures constant water supply in rainwater harvesting systems

Automatic mains backup

This fully automatic back-up system is designed for use in rainwater harvesting systems. It safeguards the system from running out of water by providing a controlled link to the mains. The float valve delivers a limited quantity of mains water (approximately 10% of the tank volume) to the storage tank whenever the stored water level falls below a pre set minimum.

  • Mains connection conforms to current Water Regulations
  • Two year guarantee
  • Easy installation
  • High reliability
  • Amount of mains water used kept to a minimum
  • Guarantees water is always available for flushing toilets and other essential functions

The automatic mains back-up system consists of a mains water feed sited outside the storage tank controlled by a float valve sited inside the tank.

The mains water feed incorporates a solenoid valve and a 50 mm stainless steel feeding hopper. The solenoid valve is automatically activated when the volume in the tank falls below a pre-set level.

The feeding hopper provides an inbuilt type AA air gap to conform with the current Water Regulations. The feed is sized from 1/2” to 2” depending on site conditions. The automatic mains back-up needs a fused spur protected by an RCD and a suitably sized mains water supply. In domestic properties it is best sited in a utility room or garage though may be installed under the stairs.

Mains water feed consists of: brass ball valve with a dirt trap made of stainless steel, mesh size 0.65 mm, connecting pressure hose with non-return valve, solenoid valve with 1.5m connecting cable and electrical plug, 50mm stainless steel feeding hopper with nozzle for spray-free filling.

With 3 bar pressure the mains feed will provide the following volumes of water:

1/2" 2.64 m³/h
3/4” 6.48 m³/h
1” 8.64 m³/h
1 1/2” 20.52 m³/h
2” 34.92 m³/h

Date publishedTitleFile sizeDocument type
17/05/2006
Rainwater harvesting
How to save 50% on metered water costs
N/A Product sheet
17/05/2006
Automatic mains back-up
152 KB Product sheet
17/05/2006
Rainwater system with standard Vortex filter
CR rainwater harvesting system with standard Vortex filter
270 KB Technical data sheet

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- use our online quotation request form.

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