Plumbing Forum | Plumbers Forums | A forum for plumbers in the UK - View Single Post

Alanka · 25-05-2008

It may just be that the 'sag' has slowly been worsening until it has reached the point when enough water/foam is trapped to cause sufficient back-pressure or airlock to be a problem.

Plastic pipework does gradually degrade/yield in sunshine and when particularly hot water is run through it, so that unsupported lengths can sag under their own weight. Seen it often.

Could be that gradual build-up of deposits in the pipe has added to the weight and the sag. (?)

25-05-2008	#2 (permalink)
Alanka Member Join Date: May 2008 Posts: 54	Re: Foam backing up dishwasher waste... It may just be that the 'sag' has slowly been worsening until it has reached the point when enough water/foam is trapped to cause sufficient back-pressure or airlock to be a problem. Plastic pipework does gradually degrade/yield in sunshine and when particularly hot water is run through it, so that unsupported lengths can sag under their own weight. Seen it often. Could be that gradual build-up of deposits in the pipe has added to the weight and the sag. (?)
Alanka Member Join Date: May 2008 Posts: 54	Cheers, Big Al Last edited by Alanka; 25-05-2008 at 06:13 PM. Reason: Further thought!