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sorry?

but what is a prd in relation to a leaking overflow on an aquatronic 4 electric shower???
colin smith, May 2010
it's not an overflow pipe it's a prd
(pressure relief device)

to much pressure has built up in the heat can
and activated the device due to a restricted/blocked shower head or the hose is restricted or damaged inside.

hi-spec plumbing & heating (essex), May 2010
link Click here to see other fixes for Aquatronic 4.