changing 3 port valve without draining down system?

[hoss55]

good evening 1 n all. can anyone please advise where to place "bungs" and what the "bungs" actually are? any other help or suggestions would be much appreciated. hoss55

 

[Boilerman2]

It is unlikely that plugging the feed & vent would stop you getting very wet, as this method when you open one connection on a system, unfortunately you will have to open up three, thereby breaking the vacuum that is vital to stop the water pouring out, so either use a freezer kit or drain down I would advise the latter

 

[Blackadder43]

If you are asking about bungs and where to put them i dont advise you do it.....
Just drain down enough until the water level is below your 3 port....last one i did like that was a bucket and half of water.....
That was 2 days ago.....

 

[ollski]

It is unlikely that plugging the feed & vent would stop you getting very wet, as this method when you open one connection on a system, unfortunately you will have to open up three, thereby breaking the vacuum that is vital to stop the water pouring out, so either use a freezer kit or drain down I would advise the latter

You should give it a go, you may find yourself pleasantly surprised!, unless the valve is higher than all the rads on the top floor I bung 2ports and three ports and never failed me yet.

I appreciate its hard to show it but trust me these bungs are holding this valve swap

Untitled

• ollski
• 21 Apr 2010
• 1

Untitled

• ollski
• 21 Apr 2010
• 1

 

[Whitespirit66]

Some systems have plenty of gate valves (red wheel-headed valves) fitted on the pipework leading to the motorised valve.

The other day, I changed a motorised valve by turning off a couple of gate valves, and one of the pump valves. Then undid the compression nuts securing the mot. valve, and only a small amount of water came out into a strategically placed bucket.

You may be lucky, see if you have valves on the pipes leading to the mot. valve.

 

[seco services]

with ollski on this one bung it.

 

[hoss55]

thanks to everyone for all advise and suggestions. valve replaced and all working correctly. as a bonus i didnt get wet either!.only took 45 mins. (2 valves close to defective one.) only drained. 1 1/2 buckets off

 

[nickso]

bungs work for everything.

ive had 5 open ends before, i just didn't know it at the time.

 

[dextrous]

Remember that you should only use time-served bungs and buckets.