Air in system

[hewie]

Hi All, first post
I got an open vented system i've recently changed from gravity to fully pumped. I seem to be sucking air into the system.
I teed off the vent pipe to the pump to feed 2 zone valves. I teed in the cold water feed into the vent pipe about 4ft further up.
Should I have teed cw feed closer to the pump, I've read should be within 150mm
Cheers
hewie[/list]

 

[seco services]

have you a diagram of what you have done.

 

[kevplumb]

have you a diagram of what you have done.

should be fun

 

[seco services]

it sounds fun kev just by reading what his done.
can't imagine how you can tee off the vent pipe and the cold feeds teed off 4ft away.

 

[hewie]

it sounds fun kev just by reading what his done.
can't imagine how you can tee off the vent pipe and the cold feeds teed off 4ft away.

think u got me wrong, cant find a way of posting diagram yet try tonite
Imagine the vent pipe in airing cupboard, i've teed of this for the pump
4ft above i teed off the vent pipe for the cold water feed in

 

[seco services]

by the sounds of it all you have created is a combined feed/vent.

 

[kevplumb]

View media item 17286

 

[xr4x4]

im confused too...

do you mean your old system was gravity feed to rads and hot water cyl?

now you have added a pump and motorized valves?

 

[hewie]

im confused too...

do you mean your old system was gravity feed to rads and hot water cyl?

now you have added a pump and motorized valves?

no it was gravity to HW cyl and pumped to rads. Moved boiler from kitchen to garage

 

[hewie]

View media item 17286

Thas my set up kevplumb, should the pumptee and the CW feed be closer

 

[seco services]

thats ok on a combined vent/feed.

150mm rule is when you have the vent and the feed tee into the primaries seperate.

 

[hewie]

thats ok on a combined vent/feed.

150mm rule is when you have the vent and the feed tee into the primaries seperate.

Thanks, so my set up wouldn't be the cause of air in the system?
If I moved the CW feed to the pump line would it def eliminate any chance of sucking air in?