If it's really old pipe, especially if you live in an area where the water tends to eat at the pipes a bit, beware the dreaded freeze-induced pipe rupture. It's quite exciting and leads to all kinds of fun and games if you've got nowhere downstream where you can switch off
Running a new water main please help with freezing existing
- Thread starter Wangerman
- Start date
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Thanks everyone worked a treat and I now have 2 mains isolation valves and all of the old pipe work in the floor is dead. Just need to re-run hot and cold to the kitchen and hot and cold to upstairs shower room which for some reason leaves the ground floor in 15mm and converts to 1/2" iron upstairs 
Not bad for a sparks hey
Couldn't have done it without ya though
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did the freeze bung hold ok ?
how long did you leave it ?
how long did you leave it ?
Worked fine left it on for about 20 mins and all looked well frozen. Only needed about 2 mins to pop a lever valve on but the plug held for over 15 mins after that.
well can't grumble at that can you
Not at all the freeze master is a wicked bit of kit
Too right the condenser must weigh a ton
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