SDR 35 and Potable Water

[Kelly]

Can someone tell me why my rain catchment contractor says Sched 40 PVC pipe is suitable for underground rainwater catchment but SDR 35 PVC pipe is not? Not a matter of strength after burial, something technical about the pipe itself.

 

[Fitter30]

Sdr is thinner

4"PVC schedule 40 vs SDR 35

I need to run about 25 feet of 4" buried sewer pipe outside. Which is better to run PVC schedule 40 or SDR 35. A friend told me tphat the PVC would hold up better?

www.google.com

 

[Sponsor]

 

[Jeff H Young]

sdr isnt legal for potable thats the code just cant do it sewer pipe just isnt drinking water approved

 

[Kelly]

I understand that, Jeff, what I'm looking for is a why. "Just isn't approved" doesn't tell me what I need to know.

 

[LLigetfa]

Most likely it has never even been tested for food safety so it is unknown whether it would pass or fail. Not all PVC manufacturing is food safe. Remember the lead contaminated PVC blinds and toys out of China?

 

[Kelly]

Most likely it has never even been tested for food safety so it is unknown whether it would pass or fail.

Kinda what I was thinking. But with rain catchment becoming very popular in my area, a lot of 4" Sched 40 PVC is being buried in areas not subject to any vehicle traffic and the price difference between that and 4" SDR 35 is dramatic. Wondering why no upstart manufacturer has taken the opportunity to get the thin-wall stuff certified. Or perhaps all the manufactures just like the idea that we hafta buy the higher priced spread?

 

[Jeff H Young]

That dosent answer the question. the stuff is paper thin sewer pipe , thats like asking why cant we use dwv copper for drinking water answer because its for drainage and not aprooved? I know its frustrating . its also like when Mom says its time for bed ... but why we just dont have a real answer why sewer pipe isnt allowed for drinking water thats going to make sence to people unfamiliar with plumbing

 

[Tuttles Revenge]

Can someone tell me why my rain catchment contractor says Sched 40 PVC pipe is suitable for underground rainwater catchment but SDR 35 PVC pipe is not? Not a matter of strength after burial, something technical about the pipe itself.

Liability. Your contractor is on the hook for installation I'm assuming. If they're like me, they don't like to be sued for their work. I don't install products that aren't suitable for their installation when I'm doing professional work that I have to carry a warranty for.

If you wanted to install it yourself then the difference between can and can't is just doing or not doing.

 

[Jeff H Young]

nobody he gets it . Kelly wants ust to know the exact reason code dosent permit sdr 35 sewer pipe for potable water unaprooved or not tested isnt good enough