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Best bushings to reduce from 2" chamber to 1" thre

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Best bushings to reduce from 2" chamber to 1" thre

Unread postAuthor: conkfa47 » Wed Nov 09, 2011 1:37 am

I was just wondering what would be the best and simplest way to reduce a 2" chamber to a 1" thread to screw into my 1" sprinkler valve? I made a chamber and used bell reducers, not realizing that they are not pressure rated and potentially dangerous. Can anyone help me out and inform me what fittings are pressure rated that i cal use to achieve this? Any help would be greatly appreciated. :D
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Unread postAuthor: jackssmirkingrevenge » Wed Nov 09, 2011 1:48 am

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Unread postAuthor: Technician1002 » Wed Nov 09, 2011 3:18 am

What is your chamber made of? PVC can be formed into a socket on the end to accept a 2 inch to 1 inch reducer. A 1 inch nipple and 1 inch threaded male adaptor would complete it.

The standard way is to use a 2 inch coupling on the end of the chamber and place a pressure rated reducer to one inch, then the 1 inch nipple and male adaptor. Making sockets eliminates the need for the coupling.

Edit; Changed to a better photo showing how a reducer bushing can be fitted into the end of a 2 inch chamber. Here a 1.5 inch female adapter is added as a piston cylinder for a coaxial piston valve.
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Last edited by Technician1002 on Wed Nov 09, 2011 1:52 pm, edited 2 times in total.
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Unread postAuthor: Gun Freak » Wed Nov 09, 2011 6:43 am

2" coupling -> 2" spig x 1" FPT

If serviceability is needed:
2" female adapter -> 2" MPT x 1" FPT

If you can't get said bushing:
2" female adapter -> 2" male adapter -> 2" spig x 1" FPT
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