P/T Plugs AKA Pete's Plug in Chiller Systems

P/T plugs are a great way to easily and accurately get temperature and pressure readings in hydronic piping. 

I came up calling them Pete's plugs. 

When I got them at the supply house they all knew them as Pete's plugs. 

I never truly looked into why it was called a Pete's plug. 

Well I recently learned that it is actually P/T plug for "Pressure/Temperature". 

P/T makes a lot more sense honestly but I only ever heard Pete's used in the field. 

This style of plugs fall into the wet well (active well) category. 

They will thread into a threaded tap on the hydronic pipe. 

They have a rubber grommet inside of a brass housing to create the seal. 

We use needle probes and taps to press through the grommet and get our readings. 

Be careful not to use too large of a probe as it can damage the grommet and cause leaking. 

MTT

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