How to test DX copper piping prior to putting into ground

[Advancedgeothermal]

Hi have had all kinds of advice re testing loops. What is the best way to test 3/8 and 1/2 inch loops and where does one get the guage or do you just make one?

[urthbuoy]

3/8 and 1/2"? DX?

[Advancedgeothermal]

yes 3/8 and 1/2 inch OD ref type K copper tubing for DX

[Forum Admin]

adjusted title for clarification

[AMI Contracting]

As far as I know manufacturers send loops under pressure. Once field is assembled one would put a gauge and schrader valve on loop system and run pressure up with dry nitrogen.
joe