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Rubber bungs for loft tanks

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RayPooley

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Sounds like a good alternative to draining the tank while I replace teh gate but when I do the calcs there's only about half a pound of water pressure keeping the thing in. I don't know whether I am happy with that when there's 50 gallons of water in it ready to escape. I would be happier if there were some kind of spring loaded contraption that I could put between the bung and the other side of the tank to improve its security.

Anyone know of such a device? Home made even?

Thanks
 
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Have a look at jet swet
 
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Bung in the tank had always worked for me, if itā€™s open vent central heating you are dealing with, then I use a speedfit stopend on the vent pipe in preference to a bung ( as it canā€™t fall off). Although once you start to drain down the vacuum which forms helps to hold the bung anyway.
Remember to only have one open joint/ cut pipe at a time - otherwise you lose the vacuum and you are in big trouble!
 
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Ben-gee said:
Bung in the tank had always worked for me, if itā€™s open vent central heating you are dealing with, then I use a speedfit stopend on the vent pipe in preference to a bung ( as it canā€™t fall off). Although once you start to drain down the vacuum which forms helps to hold the bung anyway.
Remember to only have one open joint/ cut pipe at a time - otherwise you lose the vacuum and you are in big trouble!
Click to expand...
Bought a couple of these. Arrived today. They look ok. Like they will do the job. Will I have the bottle to rely on the 22 mm? That's another matter entirely. I'll probably fit the 22 after I've drained the tank!!! šŸ˜‚

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RayPooley said:
Sounds like a good alternative to draining the tank while I replace teh gate but when I do the calcs there's only about half a pound of water pressure keeping the thing in. I don't know whether I am happy with that when there's 50 gallons of water in it ready to escape. I would be happier if there were some kind of spring loaded contraption that I could put between the bung and the other side of the tank to improve its security.

Anyone know of such a device? Home made even?

Thanks
Click to expand...
Some tank fittings have internal "splines" for a an Allen key or something to stop rotation while fitting it and attaching pipes. Rubber bung no use there.
I changed a valve last year. Made a mushroom shaped thing and put PlumbersMait on the flange. Turned a tap on slightly, reached into the tank and held in in place as the water in the pipe drained away so the tank pressure held it on. Worked no prob.
 
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Used the old spud and carrot before got a bung kit. šŸ˜„
Mixed results depending on system design but saved hrs of work refilling and bleeding a large system.
Make sure you close pump valves and any other AAV that might be fitted on system & remember you will loose a litre of so before the water hold.
Always have everything ready in case vacuum lets go anyway.
Never rely on it 100%

Used this method in dozens of times & not had any major mishaps.
 
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Ben-gee said:
Bung in the tank had always worked for me, if itā€™s open vent central heating you are dealing with, then I use a speedfit stopend on the vent pipe in preference to a bung ( as it canā€™t fall off). Although once you start to drain down the vacuum which forms helps to hold the bung anyway.
Remember to only have one open joint/ cut pipe at a time - otherwise you lose the vacuum and you are in big trouble!
Click to expand...
He said 50 gallons so I assume it's the cold water storage tank he's talking about.
 
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RayPooley said:
Sounds like a good alternative to draining the tank while I replace teh gate but when I do the calcs there's only about half a pound of water pressure keeping the thing in. I don't know whether I am happy with that when there's 50 gallons of water in it ready to escape. I would be happier if there were some kind of spring loaded contraption that I could put between the bung and the other side of the tank to improve its security.

Anyone know of such a device? Home made even?

Thanks
Click to expand...
Champagne corks Centralheatking
 
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