Leaks in pipe. There is not a satisfactory permanent repair. For a temporary repair, see
pipe, water-copper. To determine size of mending plate needed, use string measuiing technique.
| If string measures | steel pipe size is |
| 2 3/16" | 3/8" |
| 2 5/8" | 1/2" |
| 3 1/4" | 3/4" |
| 4 1/8" | 1" |
| 5 1/4" | 1 1/4" |
| 6" | 1 1/2" |
Leaks at fittings. Don't try to tighten fitting or pipe; you may only aggravate the problem. For a temporary repair, drain the pipe and dry fitting with a torch. Clean off rust, dirt and pipe dope. Smear on plastic steel and let set for several hours before turning on water again.
Leaks at unions. See
pipe, water-copper.