pex supplyier http://www.pexsupply.com Pex Pipe and Supplies ASTM standards page
For more specifics, visit the ASTM website.
PEX Manifolds for Radiant Heat Applications Foam core (DWV) About Pe - X Chemical Resistance Chart
ansi/awwa c904 nsf - + Material complies with NSF/ANSI 61 health effects requirements
PEX 3306 RAUPEX® White UV-Shield CSA B137.5
Facts site Pex - Cross link PolyEthylene
Click here, to see conversion table NFS Standards NSF Consumer Information NSF/ANSI Standard 61 Overview
NSF Drinking Water System Components Program Plastic Plumbing Materials Drinking water system components database
Today, plastic plumbing products designed for potable water applications are usually designated with either "NSF-PW" or "NSF-61" to indicate that the product complies with the health effects requirements of NSF/ANSI Standard 61 for materials designed for contact with potable water. This standard also establishes similar guidelines for other plumbing materials, including copper tubing. If your pipe is not coded with one of these designations or if it is designated with an alternative code such "NSF-DWV," it is probably not meant for potable water applications and should not be used for such purposes.
Because PVC piping system components can be manufactured in a variety of colors, identification of application is easy. A common color scheme (although not universal) is:
Click here to see letters written to NSF by Dr. Fox. NSF used to be called the National Sanitary Foundation
Coalition of Environmental, Consumer, Public Health and Labor Organizations Have Filed Lawsuit to Overturn the Schwarzenegger Administration’s Approval of PEX Pipe On February 19, 2009, a coalition including: (1) the Consumer Federation of California; (2) Planning and Conservation League; (3) Center for Environmental Health; (4) Sierra Club California; (5) California Professional Firefighters; and (6) the California State Pipe Trades Council jointly filed a lawsuit to overturn the Commission’s approval of PEX on the grounds that it was based upon a legally inadequate environmental impact report (EIR).
Potential Environmental, Health and Economic Risks Posed by PEX
Contamination of drinking water
The PEX EIR found that methyl tertiary-butyl ether (MTBE) and tert-Butyl alcohol can leach from PEX in amounts that exceed taste, odor and health guidelines set by the State of California for drinking water. The PEX EIR found that PEX pipes can initially leach as much as 290 ppb of MTBE. The California Department of Public Health and the California Office of Health Hazard Assessment have established a drinking water taste and odor standard of 5 ppb for MTBE and a drinking water public health goal and maximum contaminant level of 13 ppb.
The PEX EIR also found that PEX can leach ethyl tertiary butyl ether (ETBE), a chemical in the same family as MTBE, in amounts exceeding 100 ppb. An expert toxicologist report commissioned as part of the PEX EIR found that the leaching of ETBE from PEX pipe could contribute to taste and odor impacts, and could potentially lead to adverse health effects.Toxic Smoke
PEX produces toxic smoke when burned in building fires.
Even short term exposure to sunlight can dramatically reduce the resistance of PEX to chlorine and result in premature rupture of the pipe. Studies show just a one-week exposure to sunlight may reduce the chlorine resistance lifetime of some PEX pipes by half; with a two week exposure completely depleting PEX of any chlorine resistance.
How Safe is PEX tubing? Hidden dangers in PEX? Cross-linked polyethylene tubing is gaining ground in residential plumbing systems, but a poster wonders whether chemicals leach out of the material into drinking water.
BPA seems better understood than many other aspects of plastics in that it does enter a body by leaching into water," he adds. "I recently worked on a house for a physician where we had these discussions. The physician decided to take his chances with the copper supply lines instead of PEX, accepting the premium in cost."
When acidic or soft water sits in the line for more than six hours, the line should be flushed for up to 60 seconds before the water is used for drinking or cooking. And in these conditions, hot water should never be used for cooking or drinking.
Adapter: PEX (top) to Polybutylene ( PB ) it is
Polybutylene Piping, Plumbing - Environmental Hazard The presence of polybutylene pipe can severely affect a home's value on the real estate market. Poly pipe generally takes 10-15 years to begin to show signs ...
Codes departments realize that replacing an entire plumbing system is extremely expensive. Some municipalities maintain "grandfather laws" for existing plumbing and therefore do not require that homeowners immediately replace PB plumbing unless walls will be opened and the plumbing exposed. Homeowners and real estate agents may also be required to inform prospective buyers of the presence of PB pipes, which may downgrade the selling price of the home unless the plumbing is replaced.
Polybutylene plumbing is a time bomb--a water disaster waiting to happen. The failures of the plumbing are well-known, even spawning class-action lawsuits in Arizona and Texas. Real estate experts, engineers and plumbing contractors recommend replacement of the system.