Power shower and CWST

15 Mar 2010
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United Kingdom
I am involved in fitting a power shower and would appreciate some advice.

I intend to get a Salamander CT50 with 15mm couplers to pump 20 litres per minute from the airing cupboard below the CWST to the shower about 5 meters away.

The current CWST is 25 gallons with a single outlet to the hot water cylinder and I want to link a second 25 gallon tank to it. I am not sure of the size and number of the connecting pipes required or the placement of the second outlet to the cold water side of the pump. Help needed here please.

Also I was hoping to run all the new pipework as plastic 15mm converting from 22mm copper where necessary. Is this wise and how would it affect fitting my second outlet from the loft to the cold water side of the pump?

Thanks for your time.
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