Funny Water

[wozz]

Had a few boiler problems last week managed to fix them before a heating engineer mate got here to asked him to change my secondary heat exchanger while he was here all went fine.  Isolated water in house partially and then outside.  

All work done fine and loads of hot water no problems.  But when i use the kitchen sink tap (near boiler and stopcock) the cold water tastes terrible! really really bad, like chemically taste.  Anyway thought it would go worked away for a few days come home and its the same! Obviously being a weekend the plumbers phone doesnt work.  

Bathroom and how water doesnt seem to have the same problem but i dont generally drink that!

Any ideas?! p****** me right off having tea with mineral water as it doesnt taste right!

 

[wozz]

update, when they were here they replaced the washing machine hose for a longer one, if I isolate the washing machine water supply my water is fine! kettle on at last! so was it the wrong WM hose?!

 

[NozSpark]

So,,, are you thinking it was partially syphoning from the washing machine?

If so it may well be worth fitting an anti syphon valve

 

[wozz]

Yes, i think its all to do with the washing machine, im crap with plumbing do you get more than one type of WM hose? would they usually come with a anti syphon valve?

also i cant think what else it could be! the taste is so rank just operating the stopcocks couldnt cause that surely!

 

[steptoe]

WM hose doesnt come with a syphoning valve usually, sounds like this longer hose has a droop in it that is allowing the syphon effect to take place,

As Noz suggest, put a non return valve on the WM feed.

 

[wozz]

so take the old one off and fit this:

http://www.screwfix.com/p/15mm-x-washing-machine-valve-with-check-valve/27660

 

[OnOff]

I have the cold to the sink as the FIRST take off on the mains to the kitchen then a NON RETURN valve after that so that any syphoning doesn't affect the drinking water. Something like this:

http://www.screwfix.com/p/15mm-double-check-valve/96336;jsessionId=rKklRzcVfg2JVJR1nlDnmxX6pL51mcpHNSvG0LCy4XSNjRXcb71S!-966183464!1366547701260

Don't forget things like a hose on an outside tap can back syphon as well - you can get those with check valves too.

 

[binky]

I've heard of tea tasting like dishwater, but never washing machine water before :^O

totally agree with the above, might also be worth checking boiler has anti-back thingy valve aswell on the top up from cold water feed.