Stop tap passing

[Matt0029]

I worked at a house where the internal stop tap was passing. But could isolate in the road. Access to the internal tap for swapping the whole valve isn't great. It it usually ok to split the valve and just change the head? Or even the washer? Thanks

 

[Matt0029]

22mm valve

 

[ShaunCorbs]

Yep aslong as the new head fits which looks like it will

 

[king of pipes]

Of course it is ☺️ as long it has isolation externally.

 

[Matt0029]

Thanks so the heads are usually the same size? Is it a box spanner job to remove? I was looking at possibly a tap spanner if not.

 

[ShaunCorbs]

The moden ish ones yes and if the screw on the handle isn’t stuck then either box would be better

 

[Matt0029]

So all been well it should just screw out and swap over like that. The body length of the old stop tap does look slightly longer.

 

[Matt0029]

Is there any need for any locktite etc around the white washer or threads. Thanks

 

[king of pipes]

Should work bit of paste is all that's needed bud .

 

[ShaunCorbs]

If the new washers stays then nothing if you loose it a couple of wraps of prfe

 

[Matt0029]

Thanks that little washer on the body doesn't seem like much to hold mains pressure? Is there a possibility of just changing the actual black stop tap washer if there is a problem swapping the body?

 

[WC1]

I'd go for changing the washer only of possible, bit of paste putting the tap back together. Change the body as a last resort.

 

[Matt0029]

Thanks and do they sell just the washer

 

[Matt0029]

With it not shutting of fully I guess it's almost certain it's the washer?

 

[Ric2013]

With it not shutting of fully I guess it's almost certain it's the washer?

Or the valve seat, in which case you need to re-grind the valve seat.

The tap head to body washer is almost certainly a fibre washer and I see no reason it should need anything additional to make a seal.

 

[Matt0029]

Ok I worked on the house and it is passing to swap the full valve would be very awkward. I guess I should really tell the customer? On the external stop tap the plastic on off piece is broke the water board is coming out to change that.

 

[Matt0029]

The stop tap looks newish so was surprised didn't fully shut off.

 

[Ben-gee]

Unscrew the guts, as per your photo, inspect the valve seat.
If the seat is good, just change the black tap washer.
If seat bad, regrind first.
If handle very stiff or graunchy, swap out guts.
If seat too far gone will either have to swap whole tap - or leave it in position fully open and add another tap further up the pipe...

 

[Matt0029]

Thanks do they usually come out ok, or can they be seized guess only one way to find out.

 

[Ben-gee]

They always come out!

Yours looks nicely clipped but even so, if it’s really tight put a wedge or something between the tap body and the wall - this will stop force on the pipework causing deformation.

Then get out the appropriate sized stilsons and away you go, if you get up as far as a pair of 60’s with no joy - give up!

 

[Matt0029]

Thanks any idea of the correct sized box spanner?

 

[Ric2013]

Thanks any idea of the correct sized box spanner?

Measure the distance across flats.

 

[Matt0029]

That's the set up. Head change the most advisable option there? Will need to cut in the the cupboard so can hold back on the valve.

 

[ShaunCorbs]

Looks like there’s screws under the caps