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Replacing ball valve of tank in loft


 
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SammyT

from United Kingdom

Joined: 05 Aug 2007
Posts: 2
Location: Birmingham,
United Kingdom

PostPosted: Sun Aug 05, 2007 6:04 pm Reply with quote

I need to change the ball valve of the tank in the loft. There is a stopcock on the pipe leading to the tank. The reason I need to change the ball valve is that even after bending the arm to the float the valve is still leaking and causing the water to go down the overflow at most inopportune times (ie at 3.00am and waking me up!). I have a couple of questions....
How do I know what size I need to buy 1/2 inch or 3/4 inch - the tank feeds the hot taps?
Having looked on the internet for purchasing a ball valve there was a site which talked about valves for low or high pressure, how do I know which I need?
How do I go about replacing the ball valve?
Advise would be much appreciated! icon_smile.gif
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Dan_Robinson

from United Kingdom

Joined: 01 Jul 2007
Posts: 28713
Location: Hertfordshire,
United Kingdom
Thanked: 4587 times

PostPosted: Sun Aug 05, 2007 6:41 pm Reply with quote

You need a half inch part-two high pressure ball valve.
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Softus

from United Kingdom

Joined: 21 Oct 2004
Posts: 19558
Location: United Kingdom
Thanked: 9 times

PostPosted: Sun Aug 05, 2007 9:24 pm Reply with quote

Please don't buy one on the Internet - there's very little saving to be had, and it will cost you an arm and a leg in hassle if it arrives faulty or damaged.

Just walk in to your local plumbers' merchant and ask for exactly what Dan specified. Get a new float as well and screw on the float before installing the valve.

If you already have a compatible float valve, then just undo the joint on the part that's inside the cistern, and leave in place the part connected to the cistern. This way you can leave undisturbed that joint that's more likely to leak, and more of a problem if it does.

You'll probably drop the fibre washer into the cistern, but at least I've warned you about it. icon_biggrin.gif
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SammyT

from United Kingdom

Joined: 05 Aug 2007
Posts: 2
Location: Birmingham,
United Kingdom

PostPosted: Tue Aug 07, 2007 3:47 pm Reply with quote

Many thanks for your advise, I'll certainly follow it and buy a 1/2 inch high pressure valve from a local plumbers merchant.

Now to be really cheeky.....
As i have no DIY skills and would like to learn, is it a difficult job to replace or is it best to get a plumber in? if it's not a too difficult job, can anyone please give a few instructions that might help.

Thanks again
icon_lol.gif
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Mike2007

from United Kingdom

Joined: 10 Feb 2007
Posts: 1072
Location: Cumbria,
United Kingdom
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PostPosted: Tue Aug 07, 2007 3:55 pm Reply with quote

Wear a head torch, makes job easier. Its a really simple job to do without much knowledge!
Top Tips. You should not be left with "spare parts" once completed icon_confused.gif
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Dan_Robinson

from United Kingdom

Joined: 01 Jul 2007
Posts: 28713
Location: Hertfordshire,
United Kingdom
Thanked: 4587 times

PostPosted: Tue Aug 07, 2007 4:26 pm Reply with quote

Your mantra with the spanners should be

"equal and opposite force".
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Softus

from United Kingdom

Joined: 21 Oct 2004
Posts: 19558
Location: United Kingdom
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PostPosted: Tue Aug 07, 2007 8:32 pm Reply with quote

Dan_Robinson wrote:
Your mantra with the spanners should be

"equal and opposite force".

You're a man after me own 'eart. icon_smile.gif
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Dan_Robinson

from United Kingdom

Joined: 01 Jul 2007
Posts: 28713
Location: Hertfordshire,
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PostPosted: Tue Aug 07, 2007 8:40 pm Reply with quote

icon_lol.gif
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Softus

from United Kingdom

Joined: 21 Oct 2004
Posts: 19558
Location: United Kingdom
Thanked: 9 times

PostPosted: Tue Aug 07, 2007 8:45 pm Reply with quote

Replaced a basin tap valve body last week (amongst many), but only after the owner had "had a go himself". He'd mangled everything, loosened the backnut, and made the tap connector leak.

He went into the kitchen and turned on the kettle, during which time I'd turned off the ball-o-fix and remove the valve body. Stunned, he asked me how the **** I'd done that.

"The right amount of force in the right direction", I said smugly. icon_biggrin.gif
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