pumping over problem

[cdodds2004]

Just after a bit of advice.

have a main 15he conventional boiler that at the point the pump switches off you get a trickle of water for about 2 seconds in the header tank.

F an E are in correct place with air jec but its about waist height in the airing cupboard. was going to combine the F and E, but wasn't quite sure why its doing it when pump stops.

 

[ShaunCorbs]

Does the port valves shut at the same time ?

 

[cdodds2004]

It has a 3 port so always open to something.

 

[ShaunCorbs]

It has a 3 port so always open to something.

Just as a try leave 3 port on manual heating does it do it then

Could be the way it's piped tho how's vent,feed and pump piped ?

 

[Leo21]

Could be a restriction in the airjec, they're prone to blocking up.

 

[cdodds2004]

yea still does it. if you leave on heating and just interrupt the power!

yea was going to remove the airjec and combine the F and E

 

[dancinplumba]

TRVs shut ?

 

[cdodds2004]

No all radiators open. Funny one isn't it

 

[mfgs]

How high is the vent above the F&E tank? Could be a partial blockage in the airjec

 

[Leo21]

How high is the vent above the F&E tank? Could be a partial blockage in the airjec

Now there's an idea.