Jandy Diffuser R0479701 – With O-Ring & Hardware for Pro Series 1.5–2.5 HP Pumps
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The Jandy R0479701 Pump Diffuser is a genuine OEM replacement component engineered to restore optimal hydraulic performance in Pro Series 1.5–2.5 HP pool pumps. This complete assembly includes the diffuser body, O-ring gasket, and all necessary mounting hardware—ensuring a proper, leak-free fit and reliable performance.
The diffuser plays a vital role in channeling water flow into the impeller and maintaining consistent pressure throughout the pump housing. When worn, cracked, or misaligned, a damaged diffuser can reduce pump efficiency, increase noise, and shorten impeller life. Installing the R0479701 restores smoother water flow, improved pump operation, and longer component life.
Jandy R0479701 Pump Diffuser Compatibility
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Designed for Jandy Pro Series pool pumps rated 1.5 to 2.5 HP.
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Works with standard 2” plumbing and diffuser housings used in Pro Series pumps.
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Direct OEM replacement for pumps requiring Jandy diffuser part R0479701.
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Fits models where diffuser mounting requires included O-ring and hardware.
Frequently asked questions
How do I know which O-ring or gasket size I need?
Seals are specified by inside diameter and cross-section thickness, not by the equipment they sit in. Measure the old seal, or use the part number from your equipment's parts diagram, since visually similar rings are frequently a size apart.
What is the part number for this seal?
Pro Series lists this seal under part number R0479701. Quote R0479701 when you cross-reference against your equipment manual, an existing part, or a parts diagram, so you are comparing the same revision.
Should I lubricate the seal on installation?
Yes - a thin film of silicone-based pool lubricant helps the seal seat evenly and makes the next service far easier. Do not use petroleum-based grease, which swells and degrades most elastomers used in pool equipment.
How do I confirm this fits my equipment?
Match the part number stamped on the component you are replacing, or look it up in the parts list for your Pro Series equipment. If your model or serial number is not named on this page, send it to us before you order and we will confirm the fit.
How often do pool seals need replacing?
Seals are consumables. Replace them whenever the component is opened, and sooner if you see flattening, cracking, a chalky surface or any weeping. A failed seal on the suction side draws air and can make a pump lose prime.
Is there a warranty on this seal?
It carries the standard Pro Series manufacturer warranty. The terms are set by Pro Series, and on some equipment the coverage only applies when a licensed professional performs the installation. Keep the receipt and packaging until you have confirmed correct operation.