- Feb 11, 2010
- 149
I'm using 1" PEX all around for my complete installation, where I'll be doubling lines for supply and return underground for a cross sectional area of just slightly more than 1.25" lines for less money. I was comparing brass valves and 1" PEX last night at Lowes while I was putting together black iron fittings for a propane tank into air tank conversion. It would appear that the ID of 1" PEX is approximately the same ID as 3/4" brass ball valves. Would there be any real benefit to using 1" brass valves on 1" PEX if 1" PEX ID is closer to 3/4" ID? Using the smaller valves would save me a significant amount of money since I'm going to install about 2 dozen valves in my setup.