Noisy air filled system

[leakydave]

Tie up the float valve...

Get a long hose pipe and run it outside well away from patio/drive etc

Induce flow in the hose either by putting the top end over the float valve outlet and pushing down on the hose or by pouring a jug of water into a funnel in the hose end...

When the water is flowing use the end to hoover out all the muck in the header tank... adding more water if necessary to loosen all the much.

There simply is too much to lose pulling all that muck [carp!] into boiler, pump etc

 

[regsmyth]

Resurrecting this thread from a couple of weeks ago... new problem.

I repiped the vent and feed pipe, took off a few radiators and hosed them out - generally seemed ok.
Cleaned the FE tank.
Fitted a Spirotech MB3 to the return near the boiler.
Turned it all on, set it to heat water, pump starts, boiler fires, but after a few mins boiler stops, although pump still running. Seems like pump isn't making water move.
The system worked before I drained and repiped it, although very noisily.

Any pointers to help me identify the problem please?

 

[twgas]

Got any pics of the new pipework setup?

 

[regsmyth]

Ok, but first, the inside of the isolation valve on the old cold feed pipe....



When I drained the tank, I let it drain through the system, it went down very slowly. I don't think any extra crud got through.

Clean FE tank.... (now refilled!)


New pipework....



When I try to bleed the pump, hardly anything comes out, as if it's dry. But how can that be with the cold feed where it is?

 

[twgas]

You should have put an air release on the pipe at the 3port valve. As it is the easiest way to bleed it is to loosen one of the compression joints, probably on the gate valve, and catch the water in a tub.

 

[regsmyth]

Thanks Mick, that did the job!
All moving around nicely now, apart from one drop. Need to investigate.
Thanks again. Winter can come now.

 

[St0rmer66]

For future reference, often just stopping and starting the pump a few times (with it on full speed) will work. But not always, at least you're prepared for all future eventualities! Glad you got it all working.