Schedule 30 to 40 coupling

[Black Mtn Construction]

I'm replacing a rotten subfloor and toilet flange for a customer. Was going smoothly until I noticed that their piping is 3" Schedule 30 and all my new pieces are Schedule 40. Can somebody please recommend a coupling that will work to join these? Do they even make them? I had found a bushing to join them since the ID of both is the same, but thought using a coupling on the outside (less obstruction in the pipe even though it's minimal) would be preferred.

 

[wwhitney]

What's wrong with a bushing? It doesn't reduce the ID of either side, it just goes between the outside of a Schedule 30 pipe and the inside of a Schedule 40 hub. E.g.

https://www.menards.com/main/plumbi...ing-dwv/pvc011290600ha/p-3289655540164039.htm

Cheers, Wayne

 

[Sponsor]

 

[Sylvan]

Live and learn I never heard of schedule 30 used for venting , or soil or waste lines

 

[wwhitney]

Live and learn I never heard of schedule 30 used for venting , or soil or waste lines

Charlotte's catalog only shows it in 3" pipe with an OD of 3.25". So I infer the hub OD is 3.5" and the advantage is that it fits in a 2x4 wall.

Cheers, Wayne

 

[Jeff H Young]

your not joining cast iron to plastic right? because 3 or 4 inch plastic is noticeably bigger than casiron and would take a cast iron to plastic adapter band. never seen sch 30 either

 

[James Henry]

Some codes prohibit schedule 30 in a building and only allow it outside underground. A drain snake will tear it up.

 

[Black Mtn Construction]

What's wrong with a bushing? It doesn't reduce the ID of either side, it just goes between the outside of a Schedule 30 pipe and the inside of a Schedule 40 hub. E.g.

https://www.menards.com/main/plumbi...ing-dwv/pvc011290600ha/p-3289655540164039.htm

Cheers, Wayne

Thank you Wayne. I’ll try to find one. Menards says it’s only sold in stores, not online and the nearest is somewhere in Ohio. Long drive from northern NY for a simple fitting.

 

[wwhitney]

Yeah, that was just the first link I found, that should give you the standard terminology to search for. Hopefully you can find someone to ship it to you. Sometimes it helps to looks up a particular manufacturer's part number (Charlotte, or Genoa, or Spears, or maybe Nibco) and then search for the part number.

Cheers, Wayne

 

[Marlinman]

Spears part # is P118-030 sewer x sch. 40 bushing.

http://www.spearsmfg.com/super_sour...log/078 PVC DWV Drain Waste Vent Fittings.pdf

 

[Black Mtn Construction]

Thanks for the help guys! Once I knew what to look for I got one ordered.

https://www.lowes.com/pd/Genova-Sch...le-30-Spigot-Flush-Bushing-Fitting/1001129362