Hayward ProSeries Sand Filters

The Hayward ProSeries is one of the most widely installed sand filter lines in residential pool filtration. All models use a corrosion-proof thermoplastic tank, umbrella-fold self-cleaning laterals, integral top diffuser, and a 7-position Vari-Flo multiport valve — included on all models except the W3S310S. Sand is not included with any model.

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Choosing the Right ProSeries Sand Filter

ProSeries filters are sized by tank diameter, which determines sand capacity, filtration area, and maximum flow rate. Match the filter's design flow rate to your pump's output at actual system operating head. Running consistently above the filter's rated flow ceiling shortens backwash intervals and accelerates wear on the valve seals and lateral assembly.

For top-mount models where both a 1.5-inch and 2-inch valve option exist (24-inch and 27-inch sizes), the tank, sand capacity, and flow rate are identical. The valve size affects head loss through the valve body only, not the filter's rated capacity. Choose the 2-inch valve when your pool plumbing uses 2-inch pipe throughout or your pump output is near the filter's flow ceiling.

The W3S310S (30-inch side-mount) is the only model in this lineup that does not ship with a valve. A compatible backwash valve must be purchased separately before installation.

Above-Ground ProSeries Sand Filters

These six models are rated for above-ground pool applications. The filter-only models (W3S166T and W3S180T) are also suitable for smaller in-ground pools.

Product	Tank	Flow Rate	Pump
Hayward ProSeries 16 In Top-Mount Sand Filter	16 in.	30 GPM	Filter only
Hayward ProSeries 16 In Sand Filter System 1 HP Pump	16 in.	30 GPM	1 HP PowerFlo LX
Hayward ProSeries 18 In Top-Mount Sand Filter	18 in.	35 GPM	Filter only
Hayward ProSeries 18 In Sand Filter System 1 HP Pump	18 in.	35 GPM	1 HP PowerFlo Matrix
Hayward ProSeries 18 In Sand Filter System 1.5 HP Pump	18 in.	35 GPM	1.5 HP PowerFlo Matrix
Hayward ProSeries 21 In Sand Filter System 1.5 HP Pump	21 in.	37 GPM	1.5 HP PowerFlo Matrix

Pump system models ship with the filter, valve, pump, one-piece base, and two hoses. Sand not included with any model. All above-ground models include a 1.5" Vari-Flo valve.

In-Ground ProSeries Sand Filters

Nine models across four tank sizes, in top-mount and side-mount configurations. The 24-inch and 27-inch sizes are each available with a 1.5-inch or 2-inch valve on the same tank.

Product	Tank	Mount	Flow Rate	Valve
Hayward ProSeries 21 In Top-Mount Sand Filter	21 in.	Top	44 GPM	1.5" incl.
Hayward ProSeries 21 In Side-Mount Sand Filter	21 in.	Side	44 GPM	1.5" incl.
Hayward ProSeries 22 In Top-Mount Sand Filter	22 in.	Top	52 GPM	1.5" incl.
Hayward ProSeries 24 In Top-Mount Sand Filter 1.5-Inch Valve	24 in.	Top	62 GPM	1.5" incl.
Hayward ProSeries 24 In Top-Mount Sand Filter 2-Inch Valve	24 in.	Top	62 GPM	2" incl.
Hayward ProSeries 27 In Top-Mount Sand Filter 1.5-Inch Valve	27 in.	Top	75 GPM	1.5" incl.
Hayward ProSeries 27 In Top-Mount Sand Filter 2-Inch Valve	27 in.	Top	75 GPM	2" incl.
Hayward ProSeries 30 In Top-Mount Sand Filter 2-Inch Valve	30 in.	Top	98 GPM	2" incl.
Hayward ProSeries 30 In Side-Mount Sand Filter	30 in.	Side	98 GPM	Not incl.

Flow rates per Hayward published specifications. The W3S310S (30-inch side-mount) ships without a valve; a compatible backwash valve must be purchased separately. Sand not included with any model.