DW85745
Member
I will compare 4 inch pipes for discussion purposes and use this for my question(s).
There appears to be three types of 4 inch pipe as follows:
ASTM...................OD.................Wall Thickness................Other
2665 .................4.50......................... .237 ....................... Schedule 40
3034..................4.215....................... .120 ........................SDR35 (also called sewer pipe)
2729..................4.215....................... .075 ....................... Thin Wall
To confuse matters even more manufacturers now have (within PVC and ABS) pipes designated as
Cellular Core, Foam Core, and those made with Recycled material. OD and wall thickness
appears to be the same as the above listing.
Questions:
1) I have found fittings for Schedule 40 and Thin Wall but NOT for SDR35. Is there a separate series of fittings
--- or -- do you use the same fittings as the Thin Wall for SDR35 since pipe OD is the same?
2) Is the primary difference between Schedule 40 and SDR35 the fact that Schedule 40 can be put under pressure
even though it may also be designated as DWV?
3) Where does ASTM 2759 fit into this picture?
There appears to be three types of 4 inch pipe as follows:
ASTM...................OD.................Wall Thickness................Other
2665 .................4.50......................... .237 ....................... Schedule 40
3034..................4.215....................... .120 ........................SDR35 (also called sewer pipe)
2729..................4.215....................... .075 ....................... Thin Wall
To confuse matters even more manufacturers now have (within PVC and ABS) pipes designated as
Cellular Core, Foam Core, and those made with Recycled material. OD and wall thickness
appears to be the same as the above listing.
Questions:
1) I have found fittings for Schedule 40 and Thin Wall but NOT for SDR35. Is there a separate series of fittings
--- or -- do you use the same fittings as the Thin Wall for SDR35 since pipe OD is the same?
2) Is the primary difference between Schedule 40 and SDR35 the fact that Schedule 40 can be put under pressure
even though it may also be designated as DWV?
3) Where does ASTM 2759 fit into this picture?
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