Hayward Pool Filter Parts by Model, Number, and Cost

Hayward filters are the most common residential pool filters in the United States, which is good news when something fails: parts are widely stocked and rarely backordered. The catch is that Hayward has sold dozens of models across sand, cartridge, and DE lines over thirty years, and parts that look interchangeable often are not. A spider gasket from a 1.5 inch valve will sit in a 2 inch valve body and still leak. This guide maps Hayward parts to the model families that use them, flags the parts that actually fail, and shows what each one costs.

If you want the generic explanation of what a lateral, a spider gasket, or a manifold actually does, the pool filter parts guide covers the anatomy for all three filter types. This page assumes you know the part and need to find the Hayward version of it.

How Do You Find the Right Hayward Filter Part?

Every Hayward filter carries a model label on the tank, and that model number determines every replacement part on the unit. Find the label, note the model exactly as printed, then pull the Hayward owner manual for that model. Each manual contains an exploded parts diagram with a numbered callout for every component and the Hayward part number beside it. Order against that diagram rather than against a photo or a description, because Hayward sells physically similar parts across model families with different numbers.

That single habit prevents most wrong part orders. The model number is the key; part numbers are downstream of it.

Hayward Parts by Model Family

Hayward organizes its residential filters into three lines. Here is what each one takes.

Confirm every number above against your own owner manual before you order. Hayward revises part numbers, supersedes older ones, and occasionally splits a single part into a kit, so the number printed in your manual is the authority and the formats here are orientation only.

Two structural points are worth knowing. First, the Vari-Flo multiport valve is a separate assembly from the tank, which means a valve part list applies across many ProSeries tank sizes; if your valve is the problem, you are shopping by valve model, not by tank model. Second, SwimClear cartridge elements come as sets, typically four per filter, and mixing a new element with three worn ones creates uneven loading. The Hayward pool filter cartridges guide covers element sizing per model.

The Five Hayward Parts That Fail Most

Across Hayward’s range, the same five parts account for most service calls.

Spider gasket in the multiport valve. The flat rubber gasket with spokes that seals each port inside the Vari-Flo valve flattens and hardens over 2 to 5 years. The symptom is unmistakable: water trickling out the backwash or waste line while the valve sits in Filter. You lose pool water continuously and never see it. The diagnosis and the rest of the valve failure modes are covered in pool filter multiport valve problems.

Tank o-ring. The large ring sealing the tank halves or the lid weeps at the clamp band once it dries out or takes a set. On Hayward tanks the drip usually shows up as a wet ring on the pad under the filter rather than an obvious spray. Silicone lubricant once a season roughly doubles its life. If you are chasing a drip and are not sure it is the o-ring, why is my pool filter leaking works through the other candidates.

Pressure gauge. Hayward gauges die within 2 to 5 years, and they usually fail quietly by sticking rather than by reading zero. A gauge stuck at 14 psi looks perfectly healthy while the filter clogs behind it. If your pressure has not moved in weeks, the gauge is the first suspect, and pool filter pressure gauge not working covers the two minute test.

Laterals. The slotted fingers at the base of the standpipe in ProSeries sand filters crack with age and with freeze damage, and a single cracked lateral sends sand straight through the return jets into the pool. It is the most annoying repair on the list because reaching the laterals means removing all the sand first. The full diagnosis is in why is my pool filter blowing sand.

Cartridge elements. SwimClear cartridges are consumables, not repairables. The pleat media loses fiber and the pleats lose their spring, so pressure climbs sooner after each cleaning until cleaning stops helping at all. That progression, and where the cutoff sits, is covered in when to replace a pool filter cartridge.

For the two failures you are most likely to hit first, both parts are cheap and easy to keep on the shelf.

Shop Hayward spider gaskets on Amazon

Shop Hayward pool filter o-ring kits on Amazon

Hayward Part Costs

Prices move with season and seller, but these ranges hold for genuine Hayward parts bought online.

The decision point sits at the multiport valve. Rebuilding a Vari-Flo with a spider gasket and a key assembly costs 40 to 70 dollars in parts and an hour of your time. A complete new valve costs 90 to 180 and takes about the same hour once the plumbing is off. If the valve body itself is cracked, or if the handle detent has worn so the positions no longer index cleanly, replace the whole valve rather than chasing internals. Anything below that threshold is a parts job, and the procedures are in the pool filter repair guide.

DE grid sets are the other place to stop and think. At 150 to 300 dollars for a full Pro-Grid set, you are spending a meaningful fraction of a new filter. Grids can be replaced individually, so if only one is torn, replace that one and keep the set going.

OEM vs Generic Hayward Parts

The honest split runs along sealing surfaces.

Buy genuine for anything that seals. O-rings, spider gaskets, and lid gaskets are cheap parts doing a precision job, and generic versions are often molded slightly undersized or from a harder compound that will not conform. Saving 5 dollars on a seal that then leaks costs you a weekend of teardown, a second order, and a second teardown. The Hayward part is 5 to 12 dollars more and it fits the first time.

Buy genuine for cartridge elements too, or buy from a compatible brand with a long review history for your exact model. Pleat height and end cap diameter determine whether water goes through the media or around it, and bypass is invisible from the deck. You will only notice it as water that never quite clears.

Generic is fine for laterals, pressure gauges, drain plugs, and sight glasses. These are dimensionally forgiving parts where the tolerance stack does not matter much, and quality generic lateral sets for ProSeries tanks cost roughly half of the Hayward set. A generic gauge is a generic gauge; it will die in a few years either way.

Where to Find Hayward Parts Diagrams

Hayward publishes an owner manual for every filter model, and each manual ends with an exploded parts diagram: a line drawing of the filter with numbered callouts and a parts table listing the description and part number for each callout. Search the model number plus “owner manual” and you will find the current version as a PDF. That diagram is what a pool store looks at too.

The label itself lives in one of a few places. On ProSeries sand tanks it is a printed label on the tank body, usually facing outward at eye level or slightly below. On SwimClear cartridge filters it is on the lower tank body below the clamp band. On Pro-Grid DE filters it is on the tank side near the base. Some tanks also carry the model molded into the plastic near the base, which survives long after a printed label fades.

When the label is unreadable, work backward from physical evidence. Measure the tank diameter at the widest point and note the plumbing size, then compare against Hayward’s model specifications, since tank diameter maps closely to filter area and model. Count cartridges on a SwimClear or grids on a Pro-Grid. Note whether the valve is top mount or side mount. Those four facts narrow most Hayward filters to one or two candidates, and the parts diagrams for both will show you which one you have. Failing that, photograph the tank, valve, and base and bring the photos to a pool store, where staff identify Hayward tanks by mold shape routinely. For model background across the whole Hayward range, the Hayward pool filter guide covers which models are still current and which are legacy.

One last practical note: order the seal, not just the part. Whenever you open a Hayward tank or valve, replace the o-ring or gasket you disturbed at the same time. A ten dollar seal added to the order is cheaper than reopening the filter two weeks later, and old seals rarely reseat properly once compressed and released.

Related Guides

• Pool Filter Parts - what each filter part does, across sand, cartridge, and DE
• Hayward Pool Filter Guide - the full Hayward model range and which one you have
• Pool Filter Repair - procedures for replacing gaskets, o-rings, and failed parts
• Pool Filter Multiport Valve Problems - Vari-Flo spider gasket, key, and handle failures
• Hayward Pool Filter Cartridges - SwimClear element sizing and replacement
• Cleaning a Hayward Pool Filter - the routine cleaning that extends every part’s life