Reducer pressure rating

[wegz15]

First time posting. Can't figure this out. All the stuff I've been reading says to use pressure rated pvc. Pressure rated fittings will read NSF-PW on the piece. The 3" to 1.5" reducer I have and all I've seen online are not rated for pressure. I'm trying to make this http://www.qsl.net/k8blo/launchers.html

It seems all the pictures I've seen are using the standard pvc fitting from lowes/hd. Any help would be appreciated.

[jrrdw]

Try here: http://www.spudfiles.com/announces/topic13096.html

Welcome to Spudfiles.

[wegz15]

Ok...I've googled and checked the supplier links on the previous link. I cannot find a pressure rated 3 x 1.25 bell reducer. I thought McMaster would have had it for sure.

[jrrdw]

Does it have to be a bell reducer? You could probably get a coupler and bushing...

[wegz15]

No. I was going to head back to Lowe's and check the ratings on those. I also thought of switching from 3" to multiple 2"