Guoan Zhong
New Member
Many website say the copper pipe should be all the way into the valve. What's the reason? For me, the pipe is old. I guess previous compression valve should left some kind of dent on the pipe. So when installing the new valve, I intentionally back off a little bit after the pipe is all the way into the valve, hoping that the new ring will avoid the old 'dent' location. Does it make sense?
Initially I hired plumbers to do this kind of job. One plumber just reuse the old nut and ring; another plumber use dope. I was not satisfied, I want to follow the instruction: install without dope. So I decided to do the rest of the job it by myself. I found it is not an easy job. To get the old ring and nut off the pipe, a special puller is needed. After taking off the old ring and nut, I found that it was also installed with dope. Anyway, after many adjustments, one out of four valves I installed still leaks a little bit. I took it off, and found the reason: the ring was little bit tilted: half has compression mark, and half not. How to avoid this happen again?
Compression fitting may be a good thing, but it is too hard to install. Searching the website, you can find that different people has different option, even the pros.
Initially I hired plumbers to do this kind of job. One plumber just reuse the old nut and ring; another plumber use dope. I was not satisfied, I want to follow the instruction: install without dope. So I decided to do the rest of the job it by myself. I found it is not an easy job. To get the old ring and nut off the pipe, a special puller is needed. After taking off the old ring and nut, I found that it was also installed with dope. Anyway, after many adjustments, one out of four valves I installed still leaks a little bit. I took it off, and found the reason: the ring was little bit tilted: half has compression mark, and half not. How to avoid this happen again?
Compression fitting may be a good thing, but it is too hard to install. Searching the website, you can find that different people has different option, even the pros.