Pumped ch gravity he to sealed system installation problem

[ryangas]

Right guys been and converted a system to sealed from ov today but can't get any heat at the rads we located the new boiler in the cupboard where the cylinder was used the 28 mm flow and return from the cylinder to connect to the heating flow and return at the back boiler but no heat at rads one thing I found. Funny was the. Heating flow and return from the bbu go off in 22 for a foot and then go to 15 there's a rad in the lounge which goes off the 22 before it rduces which got boiling that was turned off but still nothing the flow at a few of the rads is Luke warm but that's it any suggestions please. Let me know
regards Ryan

 

[tamz]

Check for another NRV on old ch flow on chimney breast, only answer and think you have some how reversed original F & R, ask customer if upstairs rads used to come on with JUST hot water on on BBU, IF THEY DID NOT AN NRV IS FITTED

Not if it was piped by anyone with half a clue how systems worked. This seems to be an English thing. I've fitted and worked on 1000's of gravity jobs and never come across an anti gravity valve yet and neither has anyone i know up here.

To the OP for future reference.
Leave the 1" revolves where they are unless you can be bothered stripping them for scrap.
Catch onto the main runs elsewhere. It is just as easy.

 

[vern]

Not if it was piped by anyone with half a clue how systems worked. This seems to be an English thing. I've fitted and worked on 1000's of gravity jobs and never come across an anti gravity valve yet and neither has anyone i know up here.

To the OP for future reference.
Leave the 1" revolves where they are unless you can be bothered stripping them for scrap.
Catch onto the main runs elsewhere. It is just as easy.

Agree but common as muck down here, don't know where the OP is from?
i have seen loads of problems like this and also chatter of the valves if left in and the flow is going the right way....

 

[tamz]

Before the internet i'd never heard of an anti gravity valve. A bit common sense used meant it would never be needed.

This was the way we done then. Drop the CH flow leaving the boiler. CH can't work on gravity. (Excuse the magic marker it is all i could find :smile

 

[vern]

Before the internet i'd never heard of an anti gravity valve. A bit common sense used meant it would never be needed.

This was the way we done then. Drop the CH flow leaving the boiler. CH can't work on gravity. (Excuse the magic marker it is all i could find :smile

Top drawer pal I like! Yep that's how I was taught, the same guy who taught me had forearms like the top of my legs, and could bend 28mm pipe with a spring over his knee as tight as his hilmor!
Problem is down here I bet only 20% are piped like that, so they bash a anti gravity valve in, some even fitted a 22mm gate valve on c/h flow and it got called a "summer valve"

 

[tamz]

guy who taught me had forearms like the top of my legs, and could bend 28mm pipe with a spring over his knee as tight as his hilmor!

Do i know ye :lol: