Jandy R0445400 Pump Diffuser Kit | With O-Ring and Hardware | For SHPF and SHPM

OEM Jandy Pump Diffuser R0445400 is a critical internal part designed to ensure smooth and balanced water movement in SHPF and SHPM pumps. This replacement kit includes the diffuser, O-ring, and hardware for a secure, leak-resistant installation. Crafted for long-term reliability and performance, it supports proper hydraulic function, helping your pump operate at peak efficiency. Whether for repair or preventive maintenance, this diffuser assembly restores flow precision and pump integrity with minimal downtime.

Highlights

• Engineered for Flow Control: Supports even water distribution within the pump to maintain proper flow rate and reduce cavitation

• Fits SHPF and SHPM Pumps: Designed for compatibility with Jandy high-performance pumps to ensure system reliability

• Includes Complete Hardware Kit: Comes with O-ring and mounting parts for a tight seal and accurate alignment during installation

• Strengthens Pump Operation: Reinforces internal pressure balance to support energy-efficient and consistent performance

• Quick, Dependable Installation: Offers a fast solution for pump repairs with durable components made for frequent use

Includes

• (1) Pump Diffuser
• (2) Bolt
• (2) Washer
• (1) Backplate O-Ring
• (2) Diffuser O-Rings

Replacement Instructions

• Refer to Figure 2 and the associated parts list to identify the parts included in each replacement kit.

• Using a No. 1 Phillips screwdriver, remove the two (2) screws attaching the diffuser to the backplate. Carefully remove the diffuser from the backplate. See Figure 3.

• Remove any debris from the inlet and outlet of the impeller.

• Remove the motor shaft cover on the back of the motor by twisting the hex-head screw with an adjustable wrench. The motor shaft will be exposed.

• Hold the exposed motor shaft with a ½" wrench while removing the impeller center screw. Use a No. 2 Phillips screwdriver. Turn the left-handthreaded screw clockwise to loosen it.

• While holding the motor shaft with a ½" wrench, thread the new impeller onto the motor shaft. Hand-tighten the impeller until it is secure.

• Using a No. 2 Phillips screwdriver, tighten the impeller’s center screw into the center of the impeller. Turn the left-hand-threaded screw counter-clockwise to tighten it. Do not overtighten.

• Replace the motor shaft cover by inserting the cover tabs into the slots and rotating the cover 90º clockwise.

• Install the new diffuser over the impeller. Make sure you insert the alignment pins into the correct holes. The molded-in arrow must align with the molded-in arrow on the backplate. See Figure 3.

• Install the two (2) Phillips-head screws. Tighten the screws to draw the diffuser against the backplate.

• To avoid a leak, make sure the diffuser o-rings, o-ring grooves, and o-ring seal area are clean and free of debris. If grease is used to retain the o-rings, it must be silicone based. Do not use petroleum-based grease, because it will destroy the o-rings.

• If you are not installing another replacement kit, skip to Section 6, Pump Assembly.

Compatibility

This diffuser kit is compatible with the following Jandy pumps

• Jandy PlusHP PHPM & PHPF Series Pump (2006-Current)
• Jandy MaxHP MHPM Series Pump (2006-2010)
• Jandy Stealth SHPF & SHPM Series Pump (2008 - Current)
• Jandy Water Features Pump, WTFR Models
• Jandy ePump Variable Speed Pump (2008-Present)
• Jandy ePump + SVRS Variable-Speed Pump (2013-Present)
• Jandy ePump 2.2HP Pumps
• Jandy ePump 2.7HP Pumps
  
• Jandy PlusHP 2.7 HP VS Series Pump (2014-Present)

Note: This diffuser may be compatible with your pump please check owners manual to ensure compatibility

Additional Info

R0445400 Diffuser Assembly For Local Jandy Pump Repairs

R0445400 fits Stealth, PlusHP, MaxHP, and ePump models

local pros use R0445400 to rebuild pump internals and restore flow

includes molded diffuser, backplate o-ring, and install hardware

available locally for fast repairs on Jandy circulation systems

improves impeller alignment and overall water movement

Local Pickup – R0445400 Pump Diffuser With Seal Kit

compatible with ePump 2.2/2.7 HP and SHPF/SHPM models

R0445400 used in local tune-ups for aging or noisy pumps

seals and aligns the impeller for optimal hydraulic performance

OEM part supports quiet and balanced pool pump operation

buy locally with competitive pricing for Jandy pump maintenance

Jandy R0445400 Diffuser For Flow Restoration On High-Performance Pumps

includes all parts for full diffuser replacement in Jandy wet ends

restores consistent water pressure in PlusHP and WTFR pumps

fits multiple Jandy variable-speed and high-flow pump models

used by local technicians for suction-side troubleshooting

part ensures proper fitment and alignment in Jandy pump housing

Diagram