I needed to cap an open threaded side of a tap after removinhg a heater, so measured it with my (metric) rule, OD was almost exactly 25mm. So I went to my plumbers merchant and asked for a 1" cap. It was too large and measured 32mm. I went back and told him it was too big, he asked what size I wanted, I said I thought I wanted an inch, it seems what I need is 3/4 inch? So what is the measuring of? Is it the intenal diameter of the pipe it is used with?
- posted
15 years ago