Aluminum pipe used for tprv

Specific Inspection Topics Plumbing Inspections
1

OK, i feel that the aluminum pipe is not an adequate material for a TPRV discharge, my reasoning is that it is not supposed to handle high pressure and high temps, and it bends super easy therefore making it less resistant to pressure. ’

But how do i convey this, is there something on this i can reference?

Trying to figure how to write this up.

2

Allowable materials for TPR drain line are the same as for water distribution lines.

Galvanized steel, hard drawn copper, CPVC and most jurisdictions also allow PEX although some don’t.

3

From the 2006 IRC.

  • P2803.6.1 Requirements for discharge pipe. The discharge piping serving a pressure-relief valve, temperature-relief valve or combination valve shall:
      1. Be constructed of those materials listed in Section P2904.5 or materials tested, rated and approved for such use in accordance with ASME A112.4.1.

TABLE P2904.5
WATER DISTRIBUTION PIPE
MATERIAL ------------------------------------------------ STANDARD
Brass pipe ------------------------------------------------ ASTM B 43
Chlorinated polyvinyl chloride (CPVC) plastic pipe and tubing - ASTM D 2846; ASTM F 441; ASTM F 442; CSA B137.6
Copper or copper-alloy pipe -------------------------------- ASTM B 42; ASTM B 302
Copper or copper-alloy tubing (Type K, WK, L, WL, M or WM) – ASTM B 75; ASTM B 88; ASTM B 251; ASTM B 447
Cross-linked polyethylene (PEX) plastic tubing ---------------- ASTM F 877; CSA B137.5
Cross-linked polyethylene/aluminum/cross-linked polyethylene (PEX-AL-PEX) pipe - ASTM F 1281; CSACAN/CSA-B137.10
Cross-linked polyethylene/aluminum/high-density polyethylene (PEX-AL-HDPE) - ASTM F 1986
Galvanized steel pipe ---------------------------------------- ASTM A 53
Polybutylene (PB) plastic pipe and tubing --------------------- ASTM D 3309; CSA CAN3-B137.8
Polyethylene/aluminum/polyethylene (PE-AL-PE) composite pipe - ASTM F 1282
Polypropylene (PP) plastic pipe or tubing ----------------------- ASTM F 2389; CSA B137.11
Stainless steel (Type 304/304L) pipe -------------------------- ASTM A 312; ASTM A 778
Stainless steel (Type 316/316L) pipe -------------------------- ASTM A 312; ASTM A 778

4

ahh good resources thanks guys

5

Illinois Plumbing Code:

  1.     Any piping used for discharge from the relief valve shall be of  metallic material and conform with the requirements of Appendix A, Table A  (Approved Materials for Water Distribution Pipe) for potable water piping and  shall drain continuously downward to the outlet.

Approved Materials for Water Distribution Pipe](http://www.ilga.gov/commission/jcar/admincode/077/07700890ZZ9996aaR.html)
No aluminum listed here.

6

Don’t think I’ve ever seen an aluminum pipe. Interesting.