Our home was built in 1927 with a single pipe steam system. The couple that built it were bankers, and keep records of everything from the construction process. I found a copy of a quote from a conta… (View Post)

I made a proto-type ball check valve that works on a bench top setup that has maybe an inch of H20 cracking pressure. In the next few weeks I'll make enough to try on my system. (View Post)

I prefer Gorton's myself, but Barnes and Jones "Big Mouth" vent is very popular and a quality product. Vents almost twice as much as a Gorton #2. How much are you looking to expand your mai… (View Post)

Yeah. I didn't believe it at first--thought I had a bad gauge or a clogged pigtail or something. Using the conventional rules of thumb for pipe pressure losses I should be around 1.5-2.0 ounces of op… (View Post)