Rad valves and bung kits

[Billy Bob Bob]

i have never used bungs if your working on a conventional tank fed system start to drain but initially do not turn cold water off,if you can hear the tank re-filling the neutral points not blocked if you cant it is or ball valve seized then you can price that into the job and not get blamed when you cant get water back in, i always fully drain down the other thing to check on a old system,is the pump old and knackered looking? advise it may die with the excitement of re filling of course if its a pressurised sealed system bung are null and void anyway

 

[SafeGasInstall]

ok why not use a 15 mm comp end and 22 push for the OF,same think aint it ?for the sake of the £ for the kit if you going to use one at all !

i would never risk it !!!

 

[PlumbBobBob]

i use both methods they both have their places.

 

[Reg Man]

Whats the problem? Theory! Bung will make a vacum on the installation, as long as you open up one part at a time. Done it loads of times, saves introducing new inhiditor and time on the job. Just make sure you have a vacum on the system. Bung in the cold feed & bung in the open vent. Ive even changed a 3 port valve doing this. Yes you get a little bit back, not to much.

 

[Avatar]

- switch boiler and pump off
- plug vent and feed
- open 2 ends only at once

this is fine for a simple job like a straight pump/mov/or rad valve change!

Just make sure that you have pushed the plugs home properly . . .

 

[royston]

Yeah only open and do one rd valve at a time, been using them years, my dad introduced me to then years ago. Especially handy when on an emergency call out at 10pm when someones decided a floorboards sqeaking, and hammered a nail straight into a heating pipe ! Yeah ball valve can stick on a conventional drain down and yes you can hear it, but what about when you end up with air lock problems at night on a call. Do it, do it.

 

[Billy Bob Bob]

Whats the problem? Theory! Bung will make a vacum on the installation, as long as you open up one part at a time. Done it loads of times, saves introducing new inhiditor and time on the job. Just make sure you have a vacum on the system. Bung in the cold feed & bung in the open vent. Ive even changed a 3 port valve doing this. Yes you get a little bit back, not to much.

just never used them thats all may give them ago

 

[villa_tom]

Hi all - just a quick update. Had the six valves to change today AND THEY WHERE ALL SEALED SYSTEMS!!!!!!RESULT!!!! So never had the chance to use the bung, I was just contemplating it as i'm now on price work. However for the sake of saving a few minutes on a job I think I'll just stick to the trusted hose!

Thanks for all of your response's. I honestly really appreciate it, its nice to see people helping each other in this world for a change

Many thanks

Tom

 

[helpsy]

Use the bungs all the time....no problems so far(touch wood). I also use them to plug feed/vent on CWSC if gate valve seized and no isolation valve on hot outlet.