No hot stop tap, so can I use a bung in the cold tank

[oldcardriver]

I am unable to find a stop tap between the cold water storage tank in the loft and the hot water tank. There is a tap in the airing cupboard but is on the main rise to the cold water storage tank; this makes me think that this tap was put on the wrong pipe as there is also a stop tap on the main as it comes into the house.

Consequently, to enable me to change a hot tap washer in the kitchen without emptying both the cold and hot water tanks, could I put a rubber bung in the union to the pipe connected to the hot water tank. The water pressure should hold the bung in place and obviously, I can check that there is no significant passage of water before I disassemble the hot tap.

Any comments would be gratefully received.

 

[Burnerman]

You can indeed put a bung in the loft tank outlet, but you can also tie up the ball valve of the tank and let the tank drain when you have a cuppa!
You'll just lose that tank full of cold water, and very little hot.
John

 

[seco services]

Yes just bung the cws pipe outlet to the cylinder.

 

[leakydave]

Bung it yes. I use bungs from the chemist that are designed to go into different sized medicine bottles so that you can pull out medicine into a syringe for small babies.

Some have a cap and some need a bit of silicone into blank a hole.

Either way, make sure the pipe is clean, that you can get a clean cut with a roller cutter and that you have a push fit stop end in case it all goes Pete Tong. Lever valve always preferable to a god-awful gate valve.

Oh, and a quick prayer to the Goddess of Water as you cut the pipe, always works for me.

 

[stardanny]

Before you do that, check if there is a gate valve in loft near tank, sometime there is gate valve fitted in loft or in airing cupboard.

Daniel.

 

[Whitespirit66]

Before you do that, check if there is a gate valve in loft near tank, sometime there is gate valve fitted in loft or in airing cupboard.

Daniel.

Then revert to plan a, because the bvggers are always seized.

 

[ALCPlumbing]

Bung it and quickly fit a gate valve. That way you're not relying on the bung for too long. You can buy purpose made bungs.

 

[MJGas]

Just don't bung the vent as well, wouldn't want an imploded cylinder

 

[oldcardriver]

Thanks guys. With Googles help I found this "REGR05 Regin Radiator Valve Change Kit" "For use on 15mm & 22mm pipework":-

http://www.clickonbathrooms.co.uk/regr05-regin-radiator-valve-change-kit-c2x10401641

Although it is probably more expensive than "bungs from the chemist", it looks ideal for the job?