Replacing old galvanized water supply line from meter to entry at house

Users who are viewing this thread

Jadnashua

Retired Defense Industry Engineer xxx
Messages
32,770
Reaction score
1,190
Points
113
Location
New England
Copper tubing is sized by the external dimension...as you get heavier gauge copper tubing, only the ID changes as the wall thickness increases...not the OD. Because the OD stays the same size, you can use the same fittings to make connections, regardless of whether you're using type K, L, or M rigid copper tubing.

Plastic pipe like CPVC an PEX also have the same OD, but because they are quite a bit weaker, the ID is much smaller. Some of the other plastic tubing, the id stays the same, and the thickness varies based on the type of plastic and the pressure rating it achieves...higher pressure ratings typically need thicker.
 

Reach4

Well-Known Member
Messages
38,796
Reaction score
4,412
Points
113
Location
IL
For water service and well service, the polyethylene pipe would usually
follow ASTM D2239 where IPS ID is held and OD varies with PSI ratings. http://www.charterplastics.com/pipe/



http://www.charterplastics.com/pipe/ calls this IDR, and https://plasticpipe.org/pdf/chapter06.pdf says IDR = ID -Controlled Pipe Dimension Ratio.

https://www.astm.org/Standards/D2239.htm says the D2239 spec is "Standard Specification for Polyethylene (PE) Plastic Pipe (SIDR-PR) Based on Controlled Inside Diameter". http://www.carlonsales.com/techinfo/faqs/FAQ-HDPE.pdf says "SIDR stands for Standard Inside Diameter Ratio, which is the inside diameter divided by the wall thickness."
 

Jadnashua

Retired Defense Industry Engineer xxx
Messages
32,770
Reaction score
1,190
Points
113
Location
New England
FWIW, on most plastic water piping (not CPVC or PEX), you use internal fittings, so the ID must be constant and the OD can change, but with most metal piping (and their CPVC and PEX equivalents), the OD must remain constant for the fittings to work, and the ID will change (slightly on some, more on others) to provide the needed strength. PEX is a bit different in that you can use a common compression fitting on it IF you use the corresponding internal stiffener insert so it doesn't collapse.
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks