Ziggy Posted November 27, 2019 Report Share Posted November 27, 2019 Does anyone know what the taper thread is on the top of the cylinder head for the water heater inlet adapter? Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 27, 2019 Report Share Posted November 27, 2019 its a std drain plug this was all discussed while back should be 3/8"ntp x 18tpi Pete Link to comment Share on other sites More sharing options...
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