View Full Version : Piping/sizing question

07-16-2012, 09:31 AM
Been awhile. I am finally in my Amish house and getting started in getting some services installed. Because of the location of the cistern/well the pressure tank will be on one side of the basement and the water heater and most of the requiremnts (bathroom/kitchen) will be on the other side of the basement (~20-25feet). I am planning on sending the water from the P-tank over to the other side then have a distribution point for all the feeds (PEX manifold). Here are a couple line size questions:
1. What size line from the P-Tank to the manifold (1"?) PEX or PVC?
2. Tankless water heater has 3/4NPT in so can I build a 3/4" manifold on the output side to feed hot water out to the shower, sink, kitchen, etc?
3. Would I feed the shower and sinks off seperate 1/2 lines or send a 3/4 inch suppy there then tap off that with 1/2' pex.
4 Build the same thing for the cold water piping?

Thanks in advance.

Tom Sawyer
07-16-2012, 10:21 AM
I would run 1" over and reduce to 3/4" for the water heater. If your 1" line goes past any fixtures (cold) you can tee off it for them rather than go backwards later.

Gary Swart
07-16-2012, 10:36 AM
Can't use PVC for water supply inside the house. Use 1" PEX, CPVC or 3/4" copper.

Tom Sawyer
07-16-2012, 11:11 AM
Gary's right about the PVC, I missed that

Gary Swart
07-16-2012, 12:14 PM
My dad used to say, "A blind sow can find an acorn once in awhile!" I guess a dumb DIYer can find something others have missed occasionally.

07-16-2012, 04:28 PM
Sows like acorns? I thought it was a "blind squirrel".

Gary Swart
07-16-2012, 07:32 PM
Guess it depends on what part of the country you're in.

07-17-2012, 03:47 AM
Thanks Gent's!