Am going to look at a job tomorrow where they have a commercial washing machine connected to waste pump. Now, I've never looked at one before and this one has problems with the outlet side of the pump blowing off compression fittings. The outlet's 32mm to a non-return valve, then a 2m or so vertical run in 40mm, across the roofspace then drops down to an internal gulley.
It's only a few months old is working fine, just seems to have too much pressure for the compression fittings in the first metre or so of pipe. Is it ok to run the outlet pipework in normal solvent weld fittings in a rigid setup? The installer fitted one of those flexible connectors and a compression straight so was wondering if there's legislation saying there must be a flexible outlet of some sort as I can see no reason why it was done this way. Is the non-return valve too close to the pump causing a restriction?
Advice appreciated.
It's only a few months old is working fine, just seems to have too much pressure for the compression fittings in the first metre or so of pipe. Is it ok to run the outlet pipework in normal solvent weld fittings in a rigid setup? The installer fitted one of those flexible connectors and a compression straight so was wondering if there's legislation saying there must be a flexible outlet of some sort as I can see no reason why it was done this way. Is the non-return valve too close to the pump causing a restriction?
Advice appreciated.