> A PVC line with proper pitch
Aye, there's the rub. I have a similar problem with slow washing machine
drain, and it's my opinion that the line has the wrong pitch (possibly even
backwards pitch) allowing sediment and lint to collect and eventually clog
the line.
But in my case, copper sulphate does nothing to help; and the 'digester
bacteria' stuff rarely helps. Last time round, the bacteria helped only by
clogging the line completely, so I could blow the plug through with water
pressure.
Randall
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