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PostPosted: Fri Sep 29, 2017 5:56 pm 
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Hello,

My kitchen hot water tap leaks a bit from the bottom of the mechanism (the gland?). As you can see the cold looks newish but the hot is all discoloured but both are the same age (20+ years I think). After a bit of reading up, I want to replace both old style glands which have rubber washers for the more modern quarter turn ones with ceramic valves.

But I can't seem to shut the water supply off to the hot tap. The pipe which feeds the tap goes behind my washing machine and has two valve things on it (see pics). I've tried shutting off both but neither seems to shut off the hot tap so I must be doing something wrong?

If these don't shut off the hot tap supply then what do they do? And how do I shut it off?
Regards,
Joe


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File comment: Turned the red nozzle so it was perpendicular with the pipe direction - had no effect. Also turned the brass knob on top fully clockwise.
pipe1.jpg
pipe1.jpg [ 142.71 KiB | Viewed 783 times ]
File comment: Top pipe with square shaft - no handle so turned it clockwise with spanner.
pipe1a.jpg
pipe1a.jpg [ 98.03 KiB | Viewed 783 times ]
tapsaff.jpg
tapsaff.jpg [ 87.54 KiB | Viewed 783 times ]
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PostPosted: Fri Sep 29, 2017 6:08 pm 
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Isn't the red handle supplying the dead leg on that tee?

(Don't know why the other isn't working).

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For this message the author ayjay has received gratitude : JoeJoe
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PostPosted: Fri Sep 29, 2017 7:07 pm 
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Sorry, I don't know what you mean by dead leg and tee. The pipe with the red handle continues to the left where there is the other valve with the square shaft then continues left again where it goes under the sink and up to the hot tap.
I'm just a novice DIY'er not a plumber as you can probably tell!


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PostPosted: Fri Sep 29, 2017 7:10 pm 
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ayjay wrote:
Isn't the red handle supplying the dead leg on that tee?

(Don't know why the other isn't working).


Looks to be a redundant supply from the hot for a washing machine...

@OP we can't tell from your pics the orientation or which pipe supplies what ? more clarification ?

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PostPosted: Fri Sep 29, 2017 7:14 pm 
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Okay, I've googled dead leg. It's just the way the first pic is cropped but it's not the end of the pipe. It continues along as the topmost pipe in the second pic.
I'll try and take a better photo.


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PostPosted: Fri Sep 29, 2017 7:22 pm 
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JoeJoe wrote:
Okay, I've googled dead leg. It's just the way the first pic is cropped but it's not the end of the pipe. It continues along as the topmost pipe in the second pic.
I'll try and take a better photo.


The nut above the red handle is capping off one leg of the three-way tee: a ballofix type valve (as yours is) only operates on the pipe directly below the handle.

Ballofix tee. https://dnwgit7zg7mqr.cloudfront.net/im ... /71693.jpg

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PostPosted: Fri Sep 29, 2017 8:03 pm 
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I understand now. What I thought was a brass knob is just an end cap for a branch off that isn’t in use and the red handle only applies to the unused branch and nothing to do with the supply along to the tap. So the other valve with the square spindle missing its handle should cut off the supply to the tap. I’ll have another look tomorrow, thank you.


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PostPosted: Sat Sep 30, 2017 11:00 am 
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1. From the pictures you've shown there is no isolation valve on the hot supply.
2. If you have a combi boiler, cutting off the cold to the combi will also shut off the hot.
3. If you have a cold water storage cistern (probably in the loft) and a hot water cylinder (probably in an airing cupboard) you need to shut off the cold supply to the base of the hot water cylinder. This will probably be a valve with a red "wheel" handle, and probably close to the hot water cylinder.
4. Depending on how it is piped you may still have to turn the mains cold water off at your incoming stop valve.
5. Whether 2. or 3. you'll have to run off the water in the pipes before removing the tap head works (the brass bits showing in your picture of the chrome tap).
6. You can then remove and replace the head works. If you replace the screw down works with 1/4 turn you may get a lower water flow rate, but probably still OK.


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PostPosted: Sat Sep 30, 2017 2:10 pm 
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Thanks andy48. Number 3 is exactly what I have. This is a better picture of the thing on the hot water pipe leading to the hot tap. There is nothing else on the pipe between this and the tap. If this doesn't shut of the supply then what is it for? At least I know how to shut the hot off somewhere else now. :cheers:


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PostPosted: Sat Sep 30, 2017 2:15 pm 
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The two square headed taps in the middle pic are drain cocks by the look of it. You attach a hose to the stub, and open the valve to drain the water out.

And the last post. That image is the same.


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PostPosted: Sat Sep 30, 2017 3:06 pm 
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Have you got a mains stopcock in the front garden? Turn this off and drain down if you have to it seems a lot of messing around at the minute as you only want to do a simple seal job. :thumbright:

DWD

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