PVC water supply lines in crawlspace - InspectionNews

Jeff Eastman · #1 (**permalink**) 04-15-2007, 07:58 AM

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Jerry Peck · #2 (**permalink**) 04-15-2007, 08:46 AM

From the IRC.

- P2904.5 Water-distribution pipe.

Water-distribution piping within dwelling units shall conform to NSF 61 and shall conform to one of the standards listed in Table P2904.5.

- TABLE P2904.5

- - WATER DISTRIBUTION PIPE
- - - (PVC is not shown on the Table as an allowable material)

- P2904.4 Water service pipe.
Water service pipe shall conform to NSF 61 and shall conform to one of the standards listed in Table P2904.4.

- TABLE P2904.4
- - WATER SERVICE PIPE
- - - Polyvinyl chloride (PVC) plastic pipe

The code reference, then, is "PVC is not allowed for use as distribution piping according to P2904.4 and Table P2904.5, IRC."

Brian E Kelly · #3 (**permalink**) 04-15-2007, 08:52 AM

Jerry may be right as to the code, but in NY the code also states that local law can over ride State and or National code. We have a large amount of CPVC piping and even some PVC piping that is labeled as use with potable water. That pipe in NY would not last one winter.

Jerry Peck · #4 (**permalink**) 04-15-2007, 08:56 AM

Quote:

Originally Posted by Brian E Kelly

Jerry may be right as to the code, but in NY the code also states that local law can over ride State and or National code. We have a large amount of CPVC piping and even some PVC piping that is labeled as use with potable water. That pipe in NY would not last one winter.

*CPVC* is okay for use as supply/distribution piping.

It's the *PVC* that is not.

However, PVC *is* rated for use for potable water, which is why it is allowed outside for the water service pipe.

Are you sure that *PVC* is allowed for supply/distribution piping inside?