Originally Posted By: rgower
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http://www.nachi.org/bbsystem/usrimages/I/IMGP0829.JPG ]
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Rick
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Originally Posted By: jpope
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Cross-linked Polyethylene - PEX.
http://www.ppfahome.org/pex/faqpex.html
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Jeff Pope
JPI Home Inspection Service
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Originally Posted By: phinsperger
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Paul Hinsperger
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Originally Posted By: rgower
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Thank you both!
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Rick
Originally Posted By: mgault
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PEX is Red White and/or Blue… and the Red is a little different than Red PB. Definitely not grey!
anyway...
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-Mike
A to Z Home Inspections, LLC
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Originally Posted By: psabados
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IMG_1708.JPG )
Rated at 100 psi @ 180 degrees F.
Paul
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Originally Posted By: bkelly2
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Richard I try not to rely an the color of the piping material, if at all possible try and read either the material name or the material number.
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“I used to be disgusted, Now I try to Be amused”-Elvis Costello
Originally Posted By: mgault
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Piping colors mentioned only to rule out PB on the initial viewing, always read the material if able… I can almost always tell on the first glance, but double check to be sure. Many homes also use multiple materials (obviously!) I’ve seen Poly and PEX in the same home…
disclaimer? 
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-Mike
A to Z Home Inspections, LLC
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Originally Posted By: rgower
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Thanks guys. I would have expected to see Copper and PVC in this house. This is the first PEX I’ve seen here and the connections are the same as PB, which I ran into last week. I don’t see much of either.
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Rick
Originally Posted By: jpope
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Get used to it. PEX is fast becoming the preferred material for water supply systems.
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Jeff Pope
JPI Home Inspection Service
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Originally Posted By: sspradling
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Paul and others,
When CPVC is used as relief valve extension piping, which I see alot, would you call it out as a potential safety concern? Most relief valves are rated for 150 psi and 210 degrees. When relief valves open, to perform the safety function they are designed for, how long would one expect the exposure of the piping to high heat or pressure last? Just curious of opinions out there. Maybe I should have started a new thread on this, I hate hijackers.
Stu
Originally Posted By: jpope
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CPVC is allowed for use as TPR discharge piping per IRC P2803.6.1, P28603.6.2 and P2904.5 or (in CA) UPC 608.3
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Jeff Pope
JPI Home Inspection Service
“At JPI, we’ll help you look better”
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Originally Posted By: sspradling
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Jeff, I understand the first reference, about termination points, full diameter, not subject to freezing height above the floor, etc. Its the next reference that’s got me asking the question. Most CPVC that I see used on TPRV is printed with 180 degrees, 100 psi. That’s what got me thinking it’s not appropriate for the use.
Stu
Originally Posted By: jpope
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plastic piping should be used as discharge piping unless specifically listed for that application. The potential for plastic pipe failure is too high (IMHO). Failure of the discharge system can create a hazardous condition and raise the potential for personal injury.
Having said that, the code references are quite clear.
| Quote: |
| P2803.6.2 Relief Valve Drains. Relief valve drains shall comply with Section P2904.5 or ASME A112.4.1 |
| Quote: |
| P2904.5 Water-distribution Pipe. Water distribution piping within dwelling units shall conform to NFS 61 and shall conform to one of the standards listed in Table P2904.5. All hot-water-distribution pipe and tubing shall have a minimum pressure rating of 100 psi at 180F degrees (689 kPa at 82C). |
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Jeff Pope
JPI Home Inspection Service
"At JPI, we'll help you look better"
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Originally Posted By: rgower
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Jeff,
This seems to be my week for plumbing. I did 2 houses today. One was definitely PB. (Marked as such) The other was a gray pipe with no markings at all. Can one “assume,” that in the absence of markings, that the gray pipe is PB?
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Rick
Originally Posted By: jpope
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| rgower wrote: |
| Can one "assume," that in the absence of markings, that the gray pipe is PB? |
It's better to be safe than sorry.
I would word your report something to the effect of - Water supply system appears to be piped with Polybutylene. . .
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Jeff Pope
JPI Home Inspection Service
"At JPI, we'll help you look better"
(661) 212-0738
Originally Posted By: bkelly2
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Good response Jeff, and you might add “if concerned, further evaluation by a plumber…”
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“I used to be disgusted, Now I try to Be amused”-Elvis Costello
Originally Posted By: rgower
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Both are good ideas. Thanks!
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Rick
Originally Posted By: sspradling
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Jeff,
It reads like we are in agreement on CPVC. Unless someone else has a persuasive, different view, I will continue to explain in my reports why I recommend replacement with copper. I really appreciate the replies.
Stu
Originally Posted By: ddivito
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Concerning our opinions about CPVC as TPR drain line:
It is all in how it is presented in the report.
Recommendations about materials smacks as being an 'expert'. What other things in the report will the reader accept as being said by the 'expert' and ends up costing them money if it unneccessary? What if the client get pissed off at you because the plumber says it is alright? Not very good for one's reputation.
I stay away from communicating my personal take on materials to clients. I personnally am in agreement about questioning the use of CPVC as a drain line material. Did you also notice in the IRC table that polybutylene can be used in this instance as well?