Doug Miller wrote:
In article .com,
wrote:

Doug Miller wrote:
In article
.com,
wrote:

Pipe of the same nominal size is the same OD regardless of
schedule,

but not the same regardless of material.
E.g. nominal 3/4" steel, copper, PVC,
and CPVC pipe are different sizes.


3/4" schedule 40 steel pipe has an OD Of 1.050" and a
wall thickness of 0.113" for an ID of 0.774".
[snip]

3/4" schedule 40 PVC pipe has an OD Of 1.050" and a
wall thickness of 0.113" for an ID of 0.774".

Quick measurements of actual pipes in my basement shows the following
ODs for
nominal 3/4 pipe:
galvanized steel 1.060
sch 40 PVC 1.055
black steel 1.030
sch 40 CPVC 0.885
copper 0.875


I'll bet the copper 'pipe' is actually 7/8" rigid copper tubing.
Perhaps the same is true for the CPVC. Are they labeled ASTM D-1785
3/4" schedule 40?

--

FF