is it ok to raise F and E tank vent arm to prevent pumping over ?

[PhoenixServices]

Yes you can buy washers for in the drain offs. Any good merchant should stock them. Or just buy a whole drain off and swap the guts.

 

[kay-jay]

sounds like feed and vent arrangement is ok.

however if a magnet attracts, then you have a blockage, if theres a blockage you have crud in system, if theres crud in system you have bad circulation, if you have bad circulation you get pumping over. if you have pumping over and a blockage on the feed then you get pockets of air.


raising vent will adress symptoms and not the cause.



QED

 

[kay-jay]

p.s before circulating cleaner of any description you should have opened all lockshield valves fully.

 

[chris1970]

yes i opened all lockshields fully and removed the trv heads.
all rads will be cleaned by hand after today and i'll see if any improvement but i think i'd like to renew feed and vent anyway in the summer and run cleaner again to try and clean the pipes.
would it be an idea to poor boiling water down the vent and feed pipe because that seems to clean the rads well.
cheers guys,

 

[chris1970]

hi,
thanks again for the help and advice ,
everythings back working ,
maybe i didn't use the cleaner properly next time i will run it as hot as possible and make sure i don't have it running through the water side at all.