Jandy R0445400 diffuser kit with o-rings, screws and washers for 0.5 to 3 HP pumpsJandy 0.5 HP to 3 HP Diffuser with O-Ring and Hardware, R0445400 In stock$7899
Jandy R0445400 diffuser kit with o-rings, screws and washers for 0.5 to 3 HP pumps
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Jandy 0.5 HP to 3 HP Diffuser with O-Ring and Hardware, R0445400

Ask a questionMPN R0445400
$7899
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Quick overview

  • Genuine Jandy OEM R0445400 diffuser, the part that sits over the impeller inside the pump.
  • Covers 0.5 to 3 HP one diffuser for the whole horsepower range of these pump families.
  • Five pump families Stealth SHPF and SHPM, PlusHP PHPF and PHPM, MaxHP MHPM, WaterFeature WFTR and the ePump JEP variable speed.
  • Hardware in the box two screws, two washers and two o-rings come with the diffuser.
  • Fresh seals both o-rings are new in the kit, so the diffuser goes back in with no reused rubber.
  • Rebuild in one order pair it with an impeller and shaft seal while the pump is apart.
Full description and specifications ↓

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Frequently bought together

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Product details

The Jandy R0445400 is the genuine diffuser for Jandy's 0.5 through 3 HP pumps, supplied as a kit with the o-rings and hardware needed to fit it. One part number covers the Stealth SHPF and SHPM, PlusHP PHPF and PHPM, MaxHP MHPM, WaterFeature WFTR and the ePump JEP variable speed pumps.

In the box

One diffuser, two screws, two washers and two o-rings. That is everything the diffuser needs to go back onto the pump with fresh seals, so there is no second order for the small parts.

When to replace it

The diffuser sits over the impeller and shapes the flow into the volute. A cracked or worn diffuser costs the pump flow and can make it noisy or slow to prime. If the pump is already open for an impeller or shaft seal, it is the right time to fit a new diffuser as well.

Before you order

Confirm the pump is one of the listed Jandy families and rated between 0.5 and 3 HP. The horsepower range is broad on this part, so the family match is what matters.

From Pool School

How to Prime a Pool PumpFrom the breaker to a full pot, each manufacturer's time limit, and what to check when it won't catch prime. Read Replace the Pool Pump Motor or the Whole Pump?The manufacturers' tests first, what each repair replaces, and the federal motor rule. Read

Where this part goes

4 Key 4 on the Jandy Stealth PumpFor the SHPF0.5 (SHPF0.5), SHPF0.75 (SHPF0.75), SHPF1.0 (SHPF1.0), SHPF1.5 (SHPF1.5), SHPF2.0 (SHPF2.0), SHPF3.0 (SHPF3.0), SHPM0.75 (SHPM0.75), SHPM1.0 (SHPM1.0), SHPM1.5 (SHPM1.5), SHPM2.0 (SHPM2.0), SHPM2.5 (SHPM2.5).See it on the diagramAll Jandy Stealth, PlusHP & FloPro Pump Parts 47 parts and the drawing
Specifications
Brand Jandy
Manufacturer part number R0445400
UPC 052337021838
Type Pump diffuser kit
Horsepower range 0.5 to 3 HP
Fits Jandy Stealth SHPF/SHPM, PlusHP PHPF/PHPM, MaxHP MHPM, WaterFeature WFTR, ePump JEP variable speed pumps
Included 1 diffuser, 2 screws, 2 washers, 2 o-rings
Shipping weight 2.2 lb
Ships Parcel

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Questions and answers

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

Which Jandy pumps use this diffuser?
Stealth SHPF and SHPM, PlusHP PHPF and PHPM, MaxHP MHPM, WaterFeature WFTR and the ePump JEP variable speed pumps, from 0.5 through 3 HP.
What comes in the kit?
One diffuser, two screws, two washers and two o-rings.
Does it fit my 2 HP Stealth?
Yes. The R0445400 covers 0.5 through 3 HP in the Stealth, PlusHP, MaxHP, WaterFeature and ePump families.
Do I need a separate o-ring?
No. Two o-rings are included along with the two screws and two washers.
Ask your own question