Riceball2019 t1_jebx511 wrote on March 30, 2023 at 9:59 PM

The 2 inch schedule 20 pvc used for central vacuum fits the 2 1/2 inch vacuum hose perfectly. From there the 1 1/2 scheduled 40 pvc should almost fit inside the central vacuum schedule 20 pvc. Depending on your application you can use hot glue or tape if the fit is not perfect. You can find schedule 20 at vacuum specialty stores.

Riceball2019 t1_jebyfm5 wrote on March 30, 2023 at 10:08 PM

I had some pieces lying around and I was able to verify the 1 1/2 inch pvc fits perfectly inside the 2 inch schedule 20 pvc.

But if the fit only has to be temporary I would just use hot glue between the 1 1/2 and the vacuum hose.