Thin wall couplings

[DX]

Does Fernco (or anyone else) make a flex coupling for 4" thin wall (sewer & drain, ASTM D2729) PVC pipe? I can't find any in their listings but they are a bit awkward to navigate so I may have missed them.
I don't care if they have metal jacket or not. Thanks.

 

[wwhitney]

Fernco 3009-44 is an above grade, shielded coupling for 4" Thinwall (4.16" coupling ID) to 4" Schedule 40 (4.44" coupling ID).

I've never found a 4" thinwall to 4" thinwall rubber coupling; the last time I had to do this, I used a regular schedule 40 to schedule 40 coupling, and used solvent weld S&D to Schedule 40 bushings on the 4" S&D pipe (SDR35) to increase the OD from 4.25" to 4.5". A bell end of 4" S&D pipe is also 4.5" and will work

For below grade work, I think alot of people just use a 4" Schedule 40 to 4" Schedule 40 coupling and crank down on the bands, but that doesn't sit quite right with me. Should work fine, though.

Cheers, Wayne

 

[Sponsor]

 

[Reach4]

New product works with a big range of pipe ODs, but I don't find anybody who carries it that I have dealt with: Fernco Hulk 4.

https://www.fernco.com/hulk-coupling

https://www.consolidatedsupply.com/Product/1538938 does list it-- call for pricing. Others have references to it... I presume it is still being introduced.

I would be tempted to use Fernco 3009-44 4" Thinwall PL to 4" Sch. 40 PL or Mission TWP-44 despite the restriction. I am not a plumber. I don't think they used to specify those for above ground only. I wonder what the failure mechanism was that make them restrict those to above ground.

 

[DX]

Thanks guys. Those Hulk couplings look very nice but the only place I found them online the price is $185. Ouch! I will call Fernco tomorrow, they are in my area.