Vaillant VCW GB 242E - replace pump after 10 years service ?
Ok Geoff,
Well that's a good milestone .. solved the inter fault by giving it a
good de-fluffing and spray with wd40 .. so far so good ..
Slippage , Its a term re pump efficiency .. simply the output leaking
back to the input .. worn impeller would have a bigger clearance so
more leakage .. less pressure .. more applicable to hp pumps ..
G ..
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