Buying Guide

AHEAD OF THE FLOW
®
Revised 4/26/2019
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Fittings with Service Correction Factors
NOTE: ABS & PVC DWV used for non-pressure applications only.
N. R. - Not Recommended.
N/A - Not Available.
The maximum-allowable non-shock pressure rating for PVC and
CPVC-CTS thermoplastic piping is a function of temperature.
For pipe and fitting applications above 73°F, refer to the table
on the following page for temperature correction factors.
To determine the maximum non-shock pressure rating at an
elevated temperature, simply multiply the base pressure rating
obtained from the appropriate table by the correction factor
from the following table. Below 73°F the pressure rating will
be the same as the base pressure in the tables above.
Pipe and Tube
1
Based on water service, for more severe service, an additional correction
factor may be required.
NOTE: ABS & PVC DWV used for non-pressure applications only.
N. R. - Not Recommended.
N/A - Not Available.
Pipe and tube pressure ratings are based on non-shock service.
As the severity of the service application increases, a service-
correction factor should be considered. Specifically, for
Schedule 40 applications that may experience severe cyclincal-
pressure loading, such as in irrigation systems, the following
maximum-suggested design pressures are suggested.
Systems with threaded Schedule 80 thermoplastic fittings shall
have a maximum-suggested design pressure of 50% that of
equivalent pipe size pressure rating. This reduction is because
threads are formed by the removal of material. Refer to the
following table for maximum-suggested design pressures.
Conversely, CPVC-CTS pipe and fittings do carry the same
pressure rating, as defined by ASTM D2846. Refer to the
following table for maximum-suggested design pressures.
Maximum Non-Shock Operating Pressure (psi) AT 73°F
1
Nominal Schedule 40 Schedule 80 CPVC-CTS
Size PVC PVC SDR-11
3/8 620 920 400
1/2 600 850 400
3/4 480 690 400
1 450 630 400
1
1
/4 370 520 400
1
1
/2 330 470 400
2 280 400 400
2
1
/2 300 425 N/A
3 260 375 N/A
4 220 325 N/A
6 180 280 N/A
8 160 250 N/A
10 140 230 N/A
12 130 230 N/A
Pressure Ratings
Maximum –Suggested Design Pressure (psi) AT 73°F
1
Nominal Schedule 40 Schedule 80 CPVC-CTS
Size PVC PVC SDR-11
Socket End Threaded End Socket End
3/8 370 460 400
1/2 360 420 400
3/4 280 340 400
1 270 320 400
1
1
/4 220 260 400
1
1
/2 200 240 400
2 170 200 400
2
1
/2 180 210 N/A
3 155 190 N/A
4 130 160 N/A
6 110 N.R. N/A
8 95 N.R. N/A
10 85 N.R. N/A
12 80 N.R. N/A