Sta-Rite C1-216P pump diffuser for 1/2 HP full rate and 3/4 HP up rate pumpsSta-Rite Diffuser, .5HP Full Rate / .75HP Up Rate, C1-216P In stock$4099
Sta-Rite C1-216P pump diffuser for 1/2 HP full rate and 3/4 HP up rate pumps
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Sta-Rite Diffuser, .5HP Full Rate / .75HP Up Rate, C1-216P

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$4099
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Quick overview

  • Matched to the horsepower Built for 1/2 HP full rate and 3/4 HP up rate pumps, which share the same impeller and diffuser pairing.
  • Works with the impeller The diffuser closes around the impeller and turns its flow into pressure, so the two must match.
  • Genuine Sta-Rite Factory part number C1-216P.
  • Common wear point Sand and grit passing through the pump wear the diffuser face and open up the clearance to the impeller.
  • Check the impeller too A worn diffuser usually means a worn impeller, and replacing only one rarely restores full flow.
  • Pool pump part Serviced from inside the pump housing with the seal plate off.
Full description and specifications ↓

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Product details

The Sta-Rite C1-216P is the pump diffuser for 1/2 horsepower full rate and 3/4 horsepower up rate pool pumps. Those two ratings describe the same hydraulics, which is why one diffuser covers both.

What the diffuser does

It wraps around the impeller and converts the velocity leaving the vanes into pressure. The clearance between the two is what makes that work, so a diffuser that has worn, cracked or lost its face costs flow everywhere downstream, at the filter, the heater and the returns.

Service notes

Grit passing through the pump is the usual cause of wear, and it wears the impeller at the same rate. Inspect both while the seal plate is off, and plan on replacing them together if either is worn.

Specifications
Brand Sta-Rite
Manufacturer part number C1-216P
UPC 788379732912
Type Pump diffuser
Part type Pool pump part
Fits 1/2 horsepower full rate and 3/4 horsepower up rate pumps
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.

What do FR and UR mean?
Full rate and up rate. This diffuser suits a 1/2 horsepower full rate pump or a 3/4 horsepower up rate pump, which are the same hydraulics rated two ways.
Will it fit my pump?
It is the diffuser for 1/2 HP full rate and 3/4 HP up rate models. Confirm the horsepower and rating on your motor label before ordering.
Do I need a new impeller as well?
Often, yes. The diffuser and impeller wear as a pair, and fitting a new diffuser against a worn impeller leaves the clearance open and the flow down.
Why does a diffuser matter?
It converts the velocity coming off the impeller into pressure. A cracked or worn diffuser costs you flow across the whole system.
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