SUITABLE ISOLATION VALVE FOR HOT WATER

[Jonnyo]

Hi i keep getting a leak through a ball isolation valve on a hot pipe. This is on a thermal store where this pipe can be 80c. I have gone through 3 isolation valves in two years. The plastic seal inside the valve breaks down. What vakve should i use? Gate?

 

[snowhead]

You need one that has a declared temperature rating over 80c.
That would usually exclude anything from Screwfix etc as they don't appear to give ratings.

Something like this which is up to 110c, (various sizes available.)

https://www.valvesonline.co.uk/all-products/hvac/manual-valves/ball-valves/brass-ball-valve-compression-end-with-lever.html

 

[Ric2013]

Pretty sure the Pegler lever valves available from Screwfix are steam rated.

 

[Ben-gee]

Anything decent with ptfe seals , just avoid cheapo.

 

[Aquarius]

Pretty sure the Pegler lever valves available from Screwfix are steam rated.

It would seem you are correct: Pegler Ball Valve Red 15mm - https://www.NoLinkingToThis/p/pegler-ball-valve-red-15mm/21289

 

[townfanjon]

It would seem you are correct: Pegler Ball Valve Red 15mm - https://www.NoLinkingToThis/p/pegler-ball-valve-red-15mm/21289

Fitted one today , lovely heavy well made valve .

 

[Jonnyo]

Anything decent with ptfe seals , just avoid cheapo.

You need one that has a declared temperature rating over 80c.
That would usually exclude anything from Screwfix etc as they don't appear to give ratings.

Something like this which is up to 110c, (various sizes available.)

https://www.valvesonline.co.uk/all-products/hvac/manual-valves/ball-valves/brass-ball-valve-compression-end-with-lever.html

Thanks, its so annoying. The valve leaks really slowly until it drains the top of our thermal store which is where our DHW coil sits. The family get a bit upset with cold /warm baths
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