Hayward Simplex Strainers

Basket Strainers Made of PVC, CPVC, GFPP, Platinum GFPP and Eastar (Clear PVC)

Hayward’s plastic simplex strainer is a thoughtful, user-friendly design available in PVC, CPVC and GFPP materials. Its rabbit-ear style chamber cover enables quick removal and access to the strainer basket without tools and reduces the chance of over-tightening. The body uses buttress-style threads for the chamber cover that create a downward-oriented failure path, so in the event of over-pressurization the failure mode is predictable and helps protect other system components. The cover also has a conical displacement geometry that reduces chamber volume when the basket is accessed and helps seal the basket in place by applying downward pressure on its handle. The vent port is easily opened to bleed air during filling and can be retrofitted with a valve if desired.

 

The strainer body uses the same style of drain plug, which can be upgraded to a drain kit with valve. An integrally molded flat base with four slots allows the unit to be secured to a mounting surface. Three true-union ports (one inlet and two possible outlets) accommodate both straight-through orientation (inlet and outlet 180° apart on the same centerline) and same-side inlet/outlet layouts. The unused port receives a blank true-union cap; the active ports accept threaded, socket or flanged true-union connectors.

 

True-union connections simplify installation and allow the strainer to be removed without cutting and replacing piping — especially useful with solvent-cemented socket joints.

 

The only elastomers are captured o-rings for the chamber cover and true-union connections plus o-rings for the vent and drain plugs. Available o-ring materials are EPDM or FKM.

 

The strainer basket has an angled seating ring that matches the angle inside the body, preventing the basket from rotating under turbulent flow. The basket is molded from the same material as the body; a 316L stainless steel basket is available as an upgrade.

 

A frequent question is whether these strainers are Schedule 40 or Schedule 80. The answer is neither. Schedule ratings describe uniform wall thickness of pipe; molded products have varying wall sections and therefore cannot be assigned a schedule. Refer instead to the pressure-by-temperature chart for the selected material to confirm that the application stays within the strainer’s limits. Each of our individual material pages links to the catalog pages and the pressure/temperature charts.

 

Other significant aspects to consider

• Never use plastic strainers for compressible fluids such as air or nitrogen.
• Maximum fluid velocity should not exceed 5–8 FPS; our sizing calculators use 5 FPS as the design standard.
• The piping system must be independently supported. The strainer is not designed to support piping, nor should piping support the strainer. Mount the strainer to a firm surface and support the upstream and downstream piping independently.
• Always review pressure limitations at the actual fluid temperature and take steps to reduce the risk of water hammer.

 

Plastic simplex strainers are used for liquids or environments that are aggressive to alloy strainers and are intended for installation in non-alloy piping systems. If a plastic strainer must be installed in an alloy piping system, provide at least 10 pipe diameters of plastic piping upstream and downstream to accommodate differences in thermal expansion, vibration and pipe-loading forces. Connecting a plastic strainer directly to metal piping can damage the strainer.