union in drop ceiling?

[howitt]

Can you install a union in a drop ceiling? I need to install a mechanical solenoid shut off valve high in the piping system and I was wondering if it's ok to put a union in before the mechanical shut off in the drop ceiling space?

[Admin]

Clause 6.14.4 - A union or a combination of fittings designed and intended to act as a swing joint shall not be used where piping is concealed.

I would consider a union installed behind a drop ceiling to be concealed, even if it's accessible by removing a tile.  I'm not sure if that was the intent of Clause 6.14.4, but unfortunately that's how it's worded.

To circumvent this rule I have used 2 steel couplings and CSST with fittings to act like a union which prevented me from having to tear back all the gas piping.

Verify the CSST you use is approved to be concealed.  I know Gastite is approved, but in some cases require the CSST be protected by strike plates.

[Admin]

It would be nice if the Gas Code defined the word concealed.  There should be concealment with accessibility and concealment without.  But then we'd be asking for their definition of accessible!