I've moved into a house that has one twin pump on the hot and cold water pipes (leading from the tanks) to make the upstairs shower more powerful. It works fine in the shower, as it switches itself on (mains electric) when it senses flow in the pipes as you first turn the shower tap on.
Unfortunately it also does this when it detects the flow of cold water to the bathroom taps and the toilets in the house. This means I'm paying money to fill up my toilets, and also means if anyone uses a tap in the night there is a loud whirring noise in my 3yr old daughter's bedroom cupboard. Not ideal!
I see there are two sensors which are fitted on the outside of the cold and hot water pipes into the pump. Shall I just unclip the sensor on the cold side, in order that demand for cold water doesn't start the pump up?
I think there is only one motor inside the pump, so a demand for hot water will trigger the hot sensor, and pump both hot and cold water. So the shower should still work the same.
Any drawbacks? Other than: the toilets will refill slower?