Concrete Retards for Pipelines
Concrete Retards for Pipelines
(OP)
I'm installing an 8-inch water transmission using C-900 pipe. I've seen criteria for concrete retards for sewer pipe and drainage pipe with slopes in excess of, say 12%. I am not aware if retards are required for potable waterlines. Any comments?? My route will have slopes of up to 40%.





RE: Concrete Retards for Pipelines
Residential Areas (Distribution Mains). Only C-900 P.V.C. pipe, Class 200 or ductile-iron pipe, Pressure
Class 350, is to be used for distribution mains of 6 inches thru 12 inches in diameter. Only ductile iron pipe
shall be used for 4-inch pipeline. For 16-inch diameter pipe, pipe must be ductile-iron pipe, or CML&C steel
pipe... Fully restrained DIP shall be used within easements with restricted access and slopes exceeding 10%...)
I have also noticed the 1997 version of the "Ten States Standards for Wastewater Facilities", in Section 33.46 pg 30-3, contains requirements for "concrete, or equal, anchors spaced..." at increasingly closer intervals as sewer slopes increase between 20-35, 35-50, and 50 percent or more.
I think what they are conceivably talking about are essentially concrete piers immediately behind the bells that are often laid ahead up a hill, such as is pictured at h
RE: Concrete Retards for Pipelines