mgbinspect Posted January 6, 2010 Report Share Posted January 6, 2010 Today I inspected a house about 56 miles out in the boonies. When I entered the crawl space, grey plastic drain lines caught my eye and my immediate temptation was to assume it was either pipe rated for electrical conduit or central vacuum. But when I crawled up to it I noticed in the printed info "PVC" and "DWV". So now I am more inclined to conclude I've just lived a sheltered life and have never seen this stuff, but it's legitimate. The male / female connections seemed deeper than I'm used to seeing by to to three times the depth. Since I'm about to sit and write this monstrocity, I'd love to KNOW as opposed to assume that this is legit sanitary line. So, I cast this out amongst the brain trust. Has anyone seen grey (about the color of PB pipe) PVC drain and waste line? It's a new one on me. Thanks in advance for the confirmation. Mike Quote Link to comment Share on other sites More sharing options...
Scottpat Posted January 6, 2010 Report Share Posted January 6, 2010 It sounds like industrial or commercial grade PVC. This type of pipe often has threaded fittings and can have a rating for pressure. I have seen schedule 40 and 80 gray PVC, but never in a residence. It is way too expensive for builders to use. Quote Link to comment Share on other sites More sharing options...
mgbinspect Posted January 6, 2010 Author Report Share Posted January 6, 2010 Scott, as I said the male / female fittings really visually resembled electrical conduit because one fit within the other so deeply with no threads. It felt heavier than central vacuum pipe, but certainly no heavier than typical PVC drain line - maybe even slightly lighter? So, based upon the "DWV" it's pretty safe to assume it's an appropriate material for the use? This was the typical mid-sixties country house - a patchwork quilt of various materials... Quote Link to comment Share on other sites More sharing options...
Scottpat Posted January 6, 2010 Report Share Posted January 6, 2010 Scott, as I said the male / female fittings really visually resembled electrical conduit because one fit within the other so deeply. So, based upon the "DWV" it's pretty safe to assume it's an appropriate material for the use? This was the typical mid-sixties country house - a patchwork quilt of various materials... I don't see any problem with it. Quote Link to comment Share on other sites More sharing options...
mgbinspect Posted January 6, 2010 Author Report Share Posted January 6, 2010 Bless you sir! Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted January 6, 2010 Report Share Posted January 6, 2010 "Industrial gray" was the color of the earliest PVC piping. It's still in use and occasionally ends up in residences. If there's ever any doubt, you can always record and look-up the ASTM standard number and find what it's approved for. DWV = ASTM D2665, D1785 & F891 Quote Link to comment Share on other sites More sharing options...
mgbinspect Posted January 6, 2010 Author Report Share Posted January 6, 2010 Thanks Bill, Either it's the first time I've seen it or I'm suffering from senility, and at 58, senility isn't out of the realm of possibility?.. [:-viking] Quote Link to comment Share on other sites More sharing options...
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