Fit a TRV without draining the system down

[jonspope]

Hello

Can I fit a TRV without fully draining down the system? When I tried to remove the rad the water inside was under presure and everything got v wet. I believe my CH sys is of the conventional vented type.

Can anyone help, I really am out of my depth!!

Cheers

Jon

 

[seco services]

bung the vent / feed pipe to cause a vacuum in the system. then you can drain the rad and work on the pipes.

 

[jonspope]

ok, where is the vent pipe?

 

[seco services]

hanging over the f/e tank

 

[jonspope]

sorry, pluging the expension pipe did not work, the water is just squirting out if the 10mm pipe when I undo the nut. Any other suggestions??

 

[seco services]

sorry, pluging the expension pipe did not work, the water is just squirting out if the 10mm pipe when I undo the nut. Any other suggestions??

you did plug both pipes as i stated earlyer vent/feed pipe.

no reason it shouldn't work never had one fail yet in yrs of plumbing.

 

[gasacs]

ok, where is the vent pipe?

I would suggest with your lack of knowledge to get a professional in. Could be a primatic cylinder then would never airlock !!

 

[jonspope]

sorry, I only plugged the expansion pipe (the one above the small tank in the loft) Which is the feed pipe? sorry to be a plank

cheers

Jon

 

[seco services]

the one in the bottom of the small tank

 

[jonspope]

Many thanks for your help, all done and working a treat!!!

 

[seco services]

did you bung or drain in the end ?

 

[jonspope]

BUNG, it worked a treat, thanks again

 

[seco services]

8)