DWV PVC for Water Supply

p00nicknick · 06-12-2010, 10:43 PM

DWV PVC: Can I use it for water supply from my new well to my new house? It is schedule 40 and is rated for 330psi. My flow calcs indicate that I need 1-1/2" pipe for supply, but the local big box hardware store only carries regular PVC up to 1" and everything over 1" is DWV PVC. Looking at the published specs for this JM Eagle pipe, there is no real difference between DWV PVC and PVC; am I mistaken? Thanks in advance for any help.

Alan · 06-12-2010, 11:09 PM

Not sure why DWV would be rated for such a high pressure....

I can guarantee that it wouldn't pass an inspection, it's probably a bad idea.

p00nicknick · 06-12-2010, 11:16 PM

My first thought was that it may be for use as a force main or for a pressurized line from a septic tank to a drain field. If it has a pressure rating that high, then I can't see why it wouldn't work

NHMaster · 06-13-2010, 08:17 AM

Work, yes. Pass code no. you can get the right stuff at any plumbing supply house. but why bother? 1 1/2 PE is available at home depot. Its less expensive and easier to work with and you won't have to play with couplings

The Engineer · 06-14-2010, 08:47 AM

DWV piping is not suitable for potable water. I'm not sure the exact difference between PVC for drainage and PVC for potable water, but if you may get chemical leaching oders or other toxic effects from using the wrong type of PVC. I would only use PVC that was tested, rated and approved for use as potable water supply, which will be stamped with a laboratory seal or mark approving its use in potable water.

a7ecorsair · 06-14-2010, 09:07 AM

Quote:

Originally Posted by The Engineer

DWV piping is not suitable for potable water. I'm not sure the exact difference between PVC for drainage and PVC for potable water, but if you may get chemical leaching oders or other toxic effects from using the wrong type of PVC. I would only use PVC that was tested, rated and approved for use as potable water supply, which will be stamped with a laboratory seal or mark approving its use in potable water.

This is the reason why some plastics aren't suitable for drinking water. If the pipe is suitable for domestic drinking water it will have something on it stating so. The big rolls of irrigation tubing for instance will say NSF PW if it is suitable for potable water. I have some CPVC lying around that has Potable printed on it.

06-12-2010, 10:43 PM	#1
p00nicknick Newbie Join Date: Jun 2010 Posts: 2	DWV PVC for Water Supply DWV PVC: Can I use it for water supply from my new well to my new house? It is schedule 40 and is rated for 330psi. My flow calcs indicate that I need 1-1/2" pipe for supply, but the local big box hardware store only carries regular PVC up to 1" and everything over 1" is DWV PVC. Looking at the published specs for this JM Eagle pipe, there is no real difference between DWV PVC and PVC; am I mistaken? Thanks in advance for any help.

06-12-2010, 11:09 PM	#2
Alan Doing it myself Join Date: Apr 2006 Location: Crescent City, CA Posts: 3,454	DWV PVC for Water Supply Not sure why DWV would be rated for such a high pressure.... I can guarantee that it wouldn't pass an inspection, it's probably a bad idea. __________________ Journeyman Plumber

06-12-2010, 11:16 PM	#3
p00nicknick Newbie Join Date: Jun 2010 Posts: 2	DWV PVC for Water Supply My first thought was that it may be for use as a force main or for a pressurized line from a septic tank to a drain field. If it has a pressure rating that high, then I can't see why it wouldn't work

06-13-2010, 08:17 AM	#4
NHMaster Licensed Master Plumber Join Date: Dec 2009 Location: New Hampshire Posts: 476	DWV PVC for Water Supply Work, yes. Pass code no. you can get the right stuff at any plumbing supply house. but why bother? 1 1/2 PE is available at home depot. Its less expensive and easier to work with and you won't have to play with couplings __________________ Always ask to see your contractors license!

06-14-2010, 08:47 AM	#5
The Engineer Member Join Date: May 2010 Location: Massachusetts Posts: 133	DWV PVC for Water Supply DWV piping is not suitable for potable water. I'm not sure the exact difference between PVC for drainage and PVC for potable water, but if you may get chemical leaching oders or other toxic effects from using the wrong type of PVC. I would only use PVC that was tested, rated and approved for use as potable water supply, which will be stamped with a laboratory seal or mark approving its use in potable water.

DWV PVC for Water Supply