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  #11  
Old 02-14-2019, 10:22 PM
Don Papenburg Don Papenburg is offline
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Another way to do leak free pipe is to use threadless couplings . Fit the pipes and then weld around the pipe . The fittings have a friction fit to the pipe . The fittings are steal not cast iron. They are a bit more expensive , so I started making my own out of threaded fittings . That was time consuming so I went with threaded fittings , and after treading in and lining things up I welded the fitting in place. leaks no more.
Piping with the PEX and nut & ferrel fittings work great also .
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  #12  
Old 02-15-2019, 01:04 AM
metal manny metal manny is offline
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I build pneumatic rigs for the SFX in the film industry and non-acetic cure silicone sealant in conjunction with PTFE plumbing tape. The joint is tightened firm to tight and never leaks.

No fancy snake oil formulas; no fancy prices either!
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  #13  
Old 02-15-2019, 01:16 AM
lots2learn lots2learn is offline
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Quote:
Originally Posted by metal manny View Post
I build pneumatic rigs for the SFX in the film industry and non-acetic cure silicone sealant in conjunction with PTFE plumbing tape. The joint is tightened firm to tight and never leaks.

No fancy snake oil formulas; no fancy prices either!
PTFE tape first on dry threads and then silicone on top of that?
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  #14  
Old 02-15-2019, 08:16 AM
David Ward David Ward is offline
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You’re right. It is yellow. I failed to mention that.
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  #15  
Old 02-16-2019, 03:27 AM
metal manny metal manny is offline
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Quote:
Originally Posted by lots2learn View Post
PTFE tape first on dry threads and then silicone on top of that?

Exactly - as simple as that!
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