I looked at other questions and could not find answer. Maybe because my question is to simple and I should know the answer.
I need to replace a main valve and it’s 600 Psi but I am not 100% whether it’s 1 inch or 1 1/4 inch , etc. There is a large “1” on the side of the valve but does this mean 1 inch? If I order a 1 inch valve off Amazon will it work?
I have not removed the valve yet but have another old cracked valve that side by side looks the same size and also has a “1” on its side. Yet when I measure the inside diameter of valve (thread edges) it is 1 1/4 inches. When I wrap a string around the pipe it’s attached to divide its length by 3.14159 it’s also approx 1 1/4 inches.
I am so confused. What does the “1” on the side of valve mean?
So can the “1” indicate the ball valve is 1 inch while my thread diameter is 1 1/4 inches? Looking at pics can anyone tell me what size valve to buy?