Have a plumbing problem. Made some modifications to hot water copper pipes in basement, then refilled with water, well found a couple of leaks...so had to drain whole system again and made repairs..before I refilled with water I filled with air at 30lb pressure..seemed to be ok so let air out and refilled again and still have one very small leak...this is on a 1" T fitting that I had very hard time getting to because of location...the T fitting seems to be just a shade bigger than the 1" copper pipe I am soldering into it...one side that I have not touched does not leak..whoever soldered that side seems like they kind of soldered in a way to build up solder along edge of joint..and so no leak there...anyway I have just repaired again and have pressurized with air at 30lbs pressure and once again can not find any leak...but I am afraid I will refill with water and get pressure up and find same leak again.
couple of questions....
- is there some liquid I can place over repair that would help to detect pinhole leak?
- if there is still leak how can I solder so as to build up solder on edge and make better connection?