Piping/sizing question

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Rngr275

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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

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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

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Can't use PVC for water supply inside the house. Use 1" PEX, CPVC or 3/4" copper.
 
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Gary Swart

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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.
 
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