Richard Nixon
Member
When is 1/2" not 1/2"? Well, always, of course, but when does it have an O.D. of 0.625"?
I have a mobile home in which the all risers look like 3/8", but measure exactly 5/8" O.D. All the fittings are labeled "1/2" and the pipe is labeled "1/2 (15mm)". I had to splice in a globe valve because a cut-off valve had failed. I bought a "1/2 x 1/2" valve at Ace and it had exactly 5/8" I.D. - fit the cut pipe perfectly.
I can't find any evidence that this size of pipe ever existed. I would write it off as 3/8 pipe, but the dimensions are not quite right and *everything* is labeled 1/2". I would write it off as some obsolete mobile home oddity, but I bought a matching, newly made globe valve quite by accident. I even went to Lowes and measured some 1/2" pipe and fittings to make sure the dimensions match the standards given everywhere for 1/2" pipe. 15 mm is doesn't even match the I.D. of 1/2" schedule 40.
My brain hurts....
I have a mobile home in which the all risers look like 3/8", but measure exactly 5/8" O.D. All the fittings are labeled "1/2" and the pipe is labeled "1/2 (15mm)". I had to splice in a globe valve because a cut-off valve had failed. I bought a "1/2 x 1/2" valve at Ace and it had exactly 5/8" I.D. - fit the cut pipe perfectly.
I can't find any evidence that this size of pipe ever existed. I would write it off as 3/8 pipe, but the dimensions are not quite right and *everything* is labeled 1/2". I would write it off as some obsolete mobile home oddity, but I bought a matching, newly made globe valve quite by accident. I even went to Lowes and measured some 1/2" pipe and fittings to make sure the dimensions match the standards given everywhere for 1/2" pipe. 15 mm is doesn't even match the I.D. of 1/2" schedule 40.
My brain hurts....