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Discuss Can't unscrew kitchen tap-water valve in order to replace it... in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

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Hey guys,
I have a one-exit water valve under the sink leading to the cold tap above. I'd like to replace it with a multi-exit valve so that I can connect the dishwasher to the main water-line. Fine, I thought. I've got myself a multi-exit valve and just need to remove the old one.
This is where I came unstuck. The thing just doesn't want to unscrew.
I have used a wrench and pliers on it and it just won't go anywhere. I assume that I just need to turn it anticlockwise.
It isn't made easier by the fact that there aren't many good points to get a grip on the thing...
I have applied WD40 about 30 mins ago and that hasn't made much difference.

Is there something I am missing? Do I need to loosen something else before it will unscrew? It doesn't look especially old, i.e. that it could have rusted inside.
Any advice would be much appreciated!
 

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Looks like it’s hot just unscrew. Which way are you undoing it?
 
it looks like they have used a jointing compound on the threads that sets so you either need to be strong or apply heat to the base to soften the compound.
 
it looks like they have used a jointing compound on the threads that sets so you either need to be strong or apply heat to the base to soften the compound.
Oh right! You mean the pink rubber-band-looking thing? How hot does it need to get? Would a hairdryer do the trick, do you reckon?
 

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