Re: PEX
Different kinds of PEX tubing have different properties. For example:
1) Silane PEX (PEX-B) can have far more anti-oxidants than PEX-A and PEX-C.
2) PEX tubing can be lined to reduce the amount of oxygen that diffuses into the tube from the surrounding air.
Also, it is possible to change the amount of chlorine in a recirculating hot water system.
There is a difference between what Authorities Having Jurisdiction should do, and what the law allows. Now that the State of California has approved PEX, California AHJs have fewer options. Unfortunately, I am under the impression that California's approval did not discriminate between types of PEX, nor did it consider the length of the manufacturer's warranty against exposure to sunlight.conarb said:Thanks Jasper, it looks like California AHJ's should exclude the product if their water is Chlorinated. If it isn't chlorinated (which all municipal water in California is), then the AHJs should disallow it in recirculating hot water systems, Inspectors then have to make a field determination as to whether it's been exposed to UV light prior to installation.
Different kinds of PEX tubing have different properties. For example:
1) Silane PEX (PEX-B) can have far more anti-oxidants than PEX-A and PEX-C.
2) PEX tubing can be lined to reduce the amount of oxygen that diffuses into the tube from the surrounding air.
Also, it is possible to change the amount of chlorine in a recirculating hot water system.