Gas line connection help

[George E. Cawthon]

You are right, I only know what was explained to me and how it was done at my home. But I happen to still have the pipe, which I just checked and it has a 30 psi gauge and an air nipple. As I remember now it was pressurized with air and the reading was at mid-point (15 psi). I wouldn't call

15 psi a pressure test, and since any pipe should easily withstand 60 psi, I probably wouldn't call that a pressure test either. Since you are testing for leaks not pressure capability, so it should be a leak test.

[CBHvac]

Well..yes..and no. Its a leak test, using pressure. We call it the leak down test. The guage we use goes to 30PSI and various inspectors will want 20PSI for 20 minutes, or no more than a 5 PSI leakdown in 30 minutes from 30...or hold even 15 PSI for 20 minutes..etc... Its only checked from the point of entry to the home, with all terminations capped off..or, if its existing, with additions, the service valves closed at the appliances.

[Greg O]

I will let the 25 guys I work with, the two guys in the inspections department and about 150 other plumbers and gas men I work with from time to time that we are all wrong! Thanks for pointing it out. Greg

[George E. Cawthon]

You're welcome. Don't feel alone. Most professions or specialist fields have adopted some terms that make no sense, are at odds with all other accepted definitions, or are just plain crazy.

Hydraulic engineers that work with large water works talk about siphons when they refer to concrete structures or pipes that carry water through a U shape such as crossing under a river or stream or simply across a valley to a bench on the other side. The fact is that they are not siphons, which by definition operate under negative pressure. True siphons in the engineering field are extremely rare, but engineers and engineering books persist in using the siphon nomenclature for structures that are pressurized.

[George E. Cawthon]

Ha. Finally, a man that makes sense, and thanks for the additional specific information. It indeed is a leak down test, thanks for clarifying that indeed call it that.