Can a power shower be used in conjunction with a combination boiler?

Under no circumstances can a power shower be fed from a combination boiler.

This is because power showers incorporate a pump, and the W.R.A.S. (Water Regulations Advisory Scheme) dictates that mains water which is what feeds a combination boiler cannot be pumped.

Contravention of this water regulation carries a substantial fine. Power showers can only be installed on a conventional gravity fed plumbing system, comprising of a cold water storage cistern and a hot water cylinder.

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