We are all below pressure to reduce our mains water consumption. In using rainwater off our personal roofs, we are able to scale back our mains water use by half and contribute to reducing our carbon footprint general.
Nonetheless, most rainwater methods need a pump to get the water to the place it is required. Also, the pump should be powerful and requires electricity. This manner doesn’t assist the carbon footprint and likewise the running value needs to be considered when fitting a rainwater system. Typical “direct feed” rainwater techniques have a strain delicate pump which maintains stress on the rainwater pipes to toilets, washing machines and any non-drinking-water tap. The pump switches itself on every time an appliance is used. Furthermore, as strain in the pipe run drops, the pump will begin up again even when there has been no demand on the water provide. The pump, subsequently, “hunts”, i.e. it routinely turns itself off and on as wanted all through the day and night. So as a result of the pump starting up attracts a peak surge in energy, electricity use is unnecessarily excessive. This effort additionally accelerates the wear on the pump bearings, seals and motor.
Using a gravity feed system along with a specially-designed header tank solves this issue.
Energy-saving rainwater programs use a sensible rainwater header tank. The primary storage tank pump feeds rainwater as much as the header tank. This fashion the appliances are fed by gravity. In smart header tanks, such because the Rain Director, the digital sensor will begin the pump solely when the tank is totally empty. A 91 litre header tank will final for 12 rest room flushes, and a clothes washing machine cycle, i.e. roughly a median household’s daily use. It additionally takes slightly below two minutes for the pump to refill the header tank. The pump would solely cycle one time per day in your common home.
About ten instances less energy will be used. Presuming one washing machine use and 12 WC flushes every day, with a direct-provide pump system energy use is @ 1.5 kilowatt-hours (the identical as utilizing a 1000 watt electric fireplace for an hour and a half every day). With a sensible header tank system, it is just 0.15 kwh per day. So with 1000 kwh costing round a hundred and ten GBP, the direct-feed system prices 59 GBP per annum in electricity, and the sensible header tank system 6 GBP.