FAQ PVC Sched 40 Pipe Support Spacing
From time to time customers ask for the proper
spacing of supports when installing PVC schedule 40
pipe. The following is a recommendation from
Remember, plastic pipe and fittings should not be
used for compressed air.
SUPPORTS: Special care must be exercised in the
spacing of supports on horizontal runs of plastic
pipe. Supports should have a reasonably broad
contact surface. Wires and rods are not
recommended if in direct contact with the pipe.
The following table is based on PVC SCH 40 pipe
filled with water.
For Cresline polyethylene pipe, use twice the number
For fluids twice the specific gravity, use twice the
number of supports suggested above.
For Schedule 80 pipe, spacing may be increased
For SDR 26, SDR 21, decrease spacing 25%—50%.
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