On Monday, January 27, 2014 9:15:37 AM UTC, Dave Liquorice wrote:
On Mon, 27 Jan 2014 00:28:42 -0800 (PST), Tom Pickles wrote:



Vent F&E

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The suction side ought not pump over, and the F&E teed into it

means it

ought not suck in air either.



However a blockage could mess things up in any system, so it seems



prudent to eliminate that first.



Thanks for the clarification John. I'll amend the pipework as you

suggest and remove the air separator.



I'm not sure the arrangement show is a good idea. A favorite place

for lime scale to form is where the feed joins the main loop, some

one in here has already mentioned that from their direct experience.

In the above layout if that stub between the main loop and vent/F&E

gets blocked things could get "interesting" as it would also block

the vent...



This is a more common arrangement, the space between the vent and F&E

should be 100 mm:



Vent F&E

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Hi Dave,

As you can see from the photo of my airing cupboard, there isn't a whole lot of room to play with in terms of current pipe layout. The hot feed from the boiler comes up from the floor in parallel with and within an inch or so of the pump itself. I'd have to tee in either the vent or the feed from the F&E tank in there to go with the layout you suggest.

Would you recommend I tee in the vent at the top, where the Aerjec is now, and the cold feed below it, tee'd into the rising hot feed?

Thanks for responding.