
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.
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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.
| 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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