PP

[recess]

What is the compatibility of a 1:100 dilution of household bleach (5.25% NaOCl) with PP pipe?

Can you refer me to a reference on this matter?

Thanks

Rescue

 

[poot]

Polypropylene is pretty inert stuff. What you asked for is a 1 to 100 ratio of bleach to water. In most cases, household bleach is pretty inocent stuff in the sense that it is not very concentrated to begin with, i.e. it is already in a light concentration when you buy it in the bottle at the grocery store (if it was highly concentrated there would be a lot more household related accidents). So, the fact that you intend to let it down even more means that it will be well under a 1% concentration -hardly worth worrying about in PP pipe. Good luck.

 

[johngerhart]

The reference I have is from the Chlorine Inst pamphlet # 96 . At 20 % hypo , PP is good to 100 F

 

[Ag93]

This message is a little late but an excellent resource for chemical resistance data on plastic piping can be found at the PPI (Plastic Pipe Institute) website :

http://www.plasticpipe.org.

You can find the technical report, TR-19 Thermoplastic Piping for the Transport of Chemicals here:

http://www.plasticpipe.org/pubs/download/reports/tr19-00.pdf