sizing mainline air valves

dave_43

I have two loops - loop A is 100' of 5" iron pipe and 100' of 4" iron. Loop B is 40'of 5" iron and 168' of 4" iron. Currently each loop has one Gorton #2 air eliminator. It seems like the individual radiators on the final risers are doing the bulk of the venting. As a result, the air valves frequently get wet and slow and the radiators do not heat consistantly. How many air eliminators should each mainline loop have? Thank you Dave

Steamhead

Stay with the Gorton #2

use 5 of these vents on main A and 4 on main B. This should allow the air to vent out of the mains in about a minute, and the end radiators will heat up much faster.

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