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Phil L

wrote:
Hello

I wonder if anyone can answer a plumbing question. I just changed the
potable water expansion tank for my unvented water system. All seems
to be working fine, but I am wondering if I have a missed a step.

I have a zilmet 24l tank pre-charged to 50 psi sitting at the highest
point in the system. Obviously the tank was full of air when I first
connect it up and I am wondering if I need to bleed the air from the
water side of the membrane to fill it up with water? There seems to
be no way to do it, and no suggestion it should be done, so I will
presumably just contract legionaire's shortly?

Any comments appreciated!

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