Recharging Diaphragm Expansion Tank
After changing a leaky pressure relief valve on my furnace, I noticed that
the diaphragm expantion tank in my hot water heating system was filled with
water.
I shut off the supply and opened the pressure relief valve. I then pushed on
the pin in the bicycle-tire valve on the expansion tank and let all the
water drain out of it through the boiler and out the expansion tank.
So far so good.
I am not sure if the diaphragm failed or I need to recharge the expansion
tank with air.
Can anyone tell me the procedure for recharging it?
Bill
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