optomist

[optomist]

I would be most obliged if someone could advise me on how to drain the water system to eliminate possible airlock. Thanks..

[buildersmate]

If this is in response to your earlier question here, I suggest you read my answer before jumping to the conclusion that you have an air-lock.
http://www.theanswerb.../Question1188053.html

[optomist]

just thought I'd try here before trawling elsewhere, will do as you suggest, thanks.