Colnago_Man
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| posted on 12/10/09 at 02:14 PM |
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OT : Plumbing Question!
Fitting a new kitchen sink this weekend - oh joy! Just need some clarifiction that the way I think I need to stop the water to the hot tap is
correct.
Plan is:
1) Fill kettle so I can still have a brew.
2) Turn off cold water at stop cock under sink
2b)Turn off boiler just incase!
3) Turn off the stop cock in the airing cupboard that is on the pipe between the cold water tank in the loft and the hot water tank in the
cupboard.
4)Turn on hot taps to empty hot tank
5)When taps stop - hot water tank should be empty at this stage.
6)Replace tape and sink
7)Turn on cold water
8)Turn on stop cock in airing cupboard till tank refills
9)Turn on boiler again
10) Test
11)Wallow in family glory.
Missed anything? Or done too much?
Thanks!
[Edited on 12/10/09 by Colnago_Man]
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nib1980
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| posted on 12/10/09 at 02:24 PM |
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personally i'd just turn off the isolator to the tap, most modern kitchens have them
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Colnago_Man
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| posted on 12/10/09 at 02:29 PM |
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quote:
Originally posted by nib1980
personally i'd just turn off the isolator to the tap, most modern kitchens have them
Definetly not a modern kitchen - therefore no isolators, will be putting them in of course.
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r1_pete
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| posted on 12/10/09 at 02:46 PM |
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As soon as the isolators are in and closed you can turn everything back on, you only need the inlet side piped up, then work backwards from the taps,
to the valves.
Also the find leak, switch supply off, fix leak, loop is easier.....
[Edited on 12/10/09 by r1_pete]
[Edited on 12/10/09 by r1_pete]
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eznfrank
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| posted on 12/10/09 at 02:48 PM |
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Freeze it using one of
THESE
and then whack an isolator on and finish the job. As long as you can get the isolator on in less than half an hour (easy!!) then it should make the
job a whole load easier.
That's what I'd do anyway, £8 odd to save messing around!
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BenB
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| posted on 12/10/09 at 02:54 PM |
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Yup. I'd also suggest a quick freeze, chop and pop on some isolating valves. Then you can make cups of tea, go to the loo etc etc with
impunity...
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Ferg
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| posted on 12/10/09 at 03:51 PM |
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If you are fitting an isolator to a kitchen hot tap, make it a full-bore lever type or don't bother. Screwdriver slot isolators have a shorter
life span in terms of leaking from the screw than the washer on the tap!! They also restrict the flow of water from a vented cylinder.
Incidentally, in the OP description, the hot water cylinder will not be empty at any point...AND be very gentle turning the gatevalve (if it's a
stopcock it's wrong) off between the tank and cylinder. They strip out when opening if they are done up too tight and that will then involve
removing it and replacing it while you stop the flow with a cork or somesuch in the tank connector.
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40inches
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| posted on 12/10/09 at 03:52 PM |
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Yep! freeze the pipes, just have everything ready to go. If you are doing the hot supply make sure the water in the pipe is cold, it will freeze warm
water but doesn't last as long and you need more refrigerant.
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Colnago_Man
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| posted on 12/10/09 at 05:04 PM |
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Well you learn something ever day! Freezing kit it is!
Many thanks for the advice, spot on as always.
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JoelP
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| posted on 12/10/09 at 08:21 PM |
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wouldnt dream of freezing it myself. Just turn the immersion heater/boiler off, have a bath to use the hot water, and run the lot out. Only take 15
mins whilst you have a brew, then pipe up in your own time with no worrying about bloody frozen plugs melting - what if you find a leak and need to
refreeze it? Also when draining, open upstairs taps to let air in, or you will get soaked when someone flushes the toilet as you work.
Beware! Bourettes is binfectious.
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Puzzled
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| posted on 12/10/09 at 08:47 PM |
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plumbing
Agree with all the steps but note----
When you turn off the cold feed to the cylinder you will not be able to drain the hot water out. Why bothe anyway??. Just drain the water in the pipe
to the hot side of the sink supply.There will be a small amount of water in this pipe which you can mop up.Isolators on the hot supply to the sink are
not usually fitted,how many times do you fit new sinks or taps???.
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woodster
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| posted on 12/10/09 at 09:49 PM |
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my plumbing tip .... push fit fittings .... the speedfit ones are the dogs blocks
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40inches
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| posted on 13/10/09 at 09:40 AM |
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quote:
Originally posted by JoelP
wouldnt dream of freezing it myself. Just turn the immersion heater/boiler off, have a bath to use the hot water, and run the lot out. Only take 15
mins whilst you have a brew, then pipe up in your own time with no worrying about bloody frozen plugs melting - what if you find a leak and need to
refreeze it? Also when draining, open upstairs taps to let air in, or you will get soaked when someone flushes the toilet as you work.
I've lost count of the number of hot supply gate valves that have refused to shut off properly or not turned back on  usually in houses more
than 10 years old, although I had a new (12 months old) property that had been plumbed with built in air locks in the hot water system, effin
nightmare.
Done 3 jobs using freezing since then, my method of choice now 
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