Drill & Tap

MikeyB

What about installing a main vent on the dry return before it drips back down to the heartford loop, have one main that has an end of main vent (vents well), another shorter main that does not have a end of main vent), not sure if i will be able to install a new vent before the 1" dry return connection off of that shorter main, would one at the end of the dry return work just as well? or should i open up the ceing and start cutting and threading the 2" main to get a ventat the right location,, thanks guys

World Plumber

Adding main vents

Big Ed_4

In a Fix..,.

.....I tap in and install a VariValve or two for a main valve. One of the few times I like to use them. Too fast for a normal radiator.


PS I might be a mind reader

World Plumber

Adding main vents

Does anyone have experience does drilling and tapping the pipe work without creating other problems? I have a customer the one end of the house gets hot on cold days and the other is quit cool sometimes 12 to 15 degrees diffrence. The main on the warm end of the house is vented the 2 long mains are not. Also is it advisable to place a mainvent in a riser. the longest main goes 35 feet then rises 8 feet then runs another 20 feet enclosed. If i put a vent in the top foot of the riser I would be 2/3 of the way should speed up the venting. Am I thinking right?

World Plumber

!/2 inch

I was thinking tapping 1/2 inch and using Gorton #1's

Big Ed_4

You can do that too