Hayward SPX2800B diffuser for Max-Flo pumpsHayward Diffuser for All Max-Flo Pumps, SPX2800B In stock$4599
Hayward SPX2800B diffuser for Max-Flo pumps
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Hayward Diffuser for All Max-Flo Pumps, SPX2800B

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$4599
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Quick overview

  • Fits all Max-Flo pumps One diffuser part number covers the Max-Flo range, including the 1800 and 2800 model series.
  • Genuine Hayward Factory part SPX2800B, not an aftermarket copy.
  • Directs flow into the impeller The diffuser seals against the impeller face and turns its output into pressure the pump can push.
  • A cracked diffuser costs you flow If the diffuser is broken or worn away from the impeller, the pump runs but moves noticeably less water.
  • Standard rebuild item It gets replaced alongside the impeller, seal and gaskets when a Max-Flo is opened up.
  • Inspect the impeller too Damage to a diffuser usually comes from debris, and the same debris marks the impeller.
Full description and specifications ↓

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Product details

The Hayward SPX2800B is the diffuser used across the Max-Flo pump range. It is the genuine Hayward part, the same one fitted at the factory.

What the diffuser does

The diffuser sits over the impeller and channels what the impeller throws outward into a smooth path toward the pump discharge. It also forms the seal on the suction side of the impeller. When it cracks, wears, or is pushed out of position, water recirculates inside the volute instead of going out to the filter, and the pump moves less water while drawing the same power.

When to change it

A Max-Flo that primes normally, has no air leak and a clean basket, but is clearly moving less water than it used to, is a good candidate. The diffuser is also a routine item to change while the pump is open for an impeller or seal job, since it is right there and cheap relative to a second teardown.

From Pool School

How to Prime a Pool PumpFrom the breaker to a full pot, each maker's time limit, and what to check when it will not catch prime. Read Replace the Pool Pump Motor or the Whole Pump?The makers' tests first, what each repair replaces, and the federal motor rule. Read
Specifications
Brand Hayward
Manufacturer part number SPX2800B
UPC 610377041133
Type Pump diffuser
Part type Pool pump part
Fits All Hayward Max-Flo pumps, including the Max-Flo 1800 and 2800 models and Max-Flo II
Shipping weight 0.4 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Which Max-Flo pumps does this fit?
Hayward lists SPX2800B as the diffuser for all Max-Flo pumps, which covers the 1800 and 2800 model series and the Max-Flo II.
Is this a genuine Hayward part?
Yes. SPX2800B is the Hayward factory part number.
How do I know the diffuser is the problem?
A pump that primes and runs but moves less water than it used to, with no leak and a clean basket, often has a cracked diffuser or one that is no longer sealing to the impeller.
Should I replace anything else at the same time?
Look at the impeller and the shaft seal while the pump is apart. Debris that damages a diffuser usually leaves marks on the impeller as well.
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