Hayward Flow Control
www.haywardflowcontrol.com
1-888-429-4635
PBVRPVIOM Rev A 9/2015
Page 5 of 20
7.
PVC and CPVC plastic products become brittle below 40°F. Use caution in their
installation and operation below this temperature.
8.
Due to differential thermal expansion rates between metal and plastic, transmittal of
pipe vibration and pipe loading forces,
DIRECT INSTALLATION OF PLASTIC
VALVES INTO METAL PIPING SYSTEMS IS NOT RECOMMENDED
. Wherever
installation of plastic valves into metal piping systems is necessary, it is recommended
that at least 10 pipe diameters in length of plastic pipe be installed upstream and
downstream of the plastic valve to compensate for the factors mentioned above.
9.
Published operating requirements are based on testing of new valves using clean
water at 70°F. Valve performance is affected by many factors including fluid chemistry,
viscosity, specific gravity, flow rate, and temperature. These should be considered
when sizing Hayward products.
10. Systems should always be depressurized and drained prior to installing or maintaining
any Hayward product.
11. Always follow your site and or company procedures for any safety training and or site
specific precautions or warnings in addition to those in this document.
WARNING
Hayward PVC and CPVC products should not be used in services with
operating temperature below 34°F.
WARNING
Failure to depressurize and drain system prior to installing or
maintaining valve may result in product damage, property damage,
personal injury, or even death.
