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Main Vent Tapping Ideas
I think our longest loop main (cloverleaf layout with 3 main loops across the whole basement that lead to radiator risers) could use a few more Gorton #2 vents. It's about 75 feet long from boiler until last radiator with 20 feet of 3.5 inch & 55 of 2 inch pipe. We have one 1/2 inch tapping so far with 3 vents on it. Would you reccomend tapping another one or two 1/2 inch holes in the main and adding 2 Gortons max per tapping to max out the 1/2 air flow, or try and increase the size of the current tapping and make an antler to hold 4 -6 Gortons from a single large tapping? Our 2 inch main the becomes 1.25 inch dry condensate return just after that last radiator for another 25 feet before returning into the boiler room.
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Bpob
Vaporstat with a 12oz cut-out and 4oz cut-in
3PSI gauge
We're thinking about reducing one Gorton #2 from the 1/2 inch pipe shown on the left in the photo to make it 2 to max out, then adding 4 Gorton #2s to another antler facing the other direction with the 1.25 inch Ts & couplers down to 1/2inch to set each Gorton in. We can always add more than 4 Gorton #2s if needed later. That long loop has more radiators, is 20 feet longer, smaller 2in vs 3.5 in diameter, and goes through colder crawl-spaces compared to the middle & short loops, so I think we'll need to seriously over-vent this loop to balance things out. We can even consider reducing the short & medium loop venting a bit if needed to favor the long loop. Any other ideas on helping a long, slow, cold, heavy radiator-line get faster steam through it?