| Its been a while, but here is my 2 cents worth. If I am not mistaken, you want a main vent on the return end of any main line there is, so if you have a split zone, you would need two vents, one on each return. That is to make sure the mains are evenly filled with steam and ready to send steam to any branch radiator line.
Banging is caused by steam hitting water someplace, and hissing is acceptable as long as it stops as soon as the steam gets there. It should not blow out moisture. You may here that one more because of the setting the radiator steam vent is set at, which is derived by how far away and how fast you want a certain radiator to heat.
A 3/4" fluctuation in the gauge glass is good. __________________
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"Can't never did a damn thing but try always did"
Mark |