Are the threads on a male PVC fitting the same as the threads on a short shank female coupling like those you'd have on layflat hose? (see image)
I want to mate the 1½" short shank to a 1½" PVC fitting but I'm not sure if the threads are compatible.
Thx for the help
The brass fitting on the lay-flat is a NST straight thread, the NPT pipe fitting is tapered.
They are both the same pitch (threads per inch) and same diameter.
They do work together but the joint will not be full strength because of the tapered pipe thread.
Cam-locks are a lot easier if you are transporting your equipment every day, any plumbing or rubber shop has either type you are looking for. You can get them in hose thread or pipe thread and there is a difference in the thread pitch. The pvc is npt and when looking at them, you can't see the difference until... you try to match the hose thread to the pipe thread, so be sure that you get the same thread for both or just go cam-lock's forever like I did decades ago - 2" Aluminum Part C Female Coupler x Hose Shank - AL-C200
Bob you can screw the NST brass hose fitting onto the PVC no problem as the seal is the rubber washer between them. I personally threw those connectors away because I was ALWAYS loosing that stupid rubber washer!
Ok so ABS does not get brittle like PVC and the ABS plastic cam lock quick connects are super strong. I think the plastic cam locks are actually better then the cast aluminum ones. The interior diameter of the aluminum cam locks is seriously restricted and has a rough texture, not consistent from one cast to the next. BUT the plastic ones have a much larger I.D. and are nice and smooth on the inside. The plastic ABS is not going to break either. When I was building my 2", 2.5" and 3" dredges the I.D. of the couplers really came into play. Feeding a Highbanker it is probably mute.