The pump sits on the attic floor beside the cold water storage tank. The present set up is plumbed into the ensuite bath on the second floor. Need to replace it with another one and wanted to get advice on replacing the 'air switch' activated model with a 'negative head' unit. the negative head pump should be OK with auto switching given the relatively low water pressure of the unpumped water.Īny thoughts.My Aquaforce 95 Purple single ended pump bit the dust during the cold winter when the impeller housing cracked. Was thinking of replacing it with a single ended negative head pump. The pump then pumps the pre mixed water through a 22mm outlet back to the shower head outlet.Ĭurrently the pump is switched on/off by an 'air pressure switch' - basically a push button with an air tube that goes back into the attic to the circuit board on the pump. Mixed hot and cold water then flow up through a 22mm feed into the pump in the attic (probably 2m+ height difference between mixer valve and pump) Hot and cold water feeds go directly from the storage tanks into the Aquavalve mixer valve located in the shower enclosure Without the pump active, there is very low water flow from the shower head. Hot water tank is located in the airing cupboard next to the en-suiteīottom of the 40 gallon cold water tank is probably 1m+ above the shower head and 30-50cm above the pumpīottom of 40 gallon hot water storage tank is probably 1-1.5m below the shower head My Aquaforce 95 Purple single ended pump bit the dust during the cold winter when the impeller housing cracked.
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