Description
Pentair Superflo seal and o-ring kit P-SFL-OSET
The Pentair Superflo seal and o-ring kit P-SFL-OSET is a complete gasket set for restoring the main hydraulic seals in Superflo pool pumps.
This kit groups all critical o-rings and the mechanical seal in one package, making it ideal for a full wet end overhaul or preventive
maintenance on residential filtration systems.
What is included in the P-SFL-OSET gasket kit
This seal set corresponds to several key sealing positions in the Superflo exploded view and replaces the original Pentair joints in one operation.
- Lid o-ring for the transparent pump cover (reference R357255).
- Main housing o-ring between pump body and backplate (reference R355619).
- Diffuser o-ring for the hydraulic insert (reference R154492 or equivalent depending on power range).
- Mechanical shaft seal for the motor shaft (reference R354545SP).
By replacing all these elements together, the Superflo pump recovers a factory level sealing performance around the lid, housing joint, diffuser
and shaft area.
Function of the seals in the Superflo pump
Each component in the Pentair Superflo seal and o-ring kit P-SFL-OSET has a specific role in keeping the pump dry on the motor side and airtight
on the suction side.
- The lid o-ring seals the transparent cover so the pump can prime without drawing in air.
- The housing o-ring seals the joint between the pump body and seal plate to prevent external leakage.
- The diffuser o-ring seals around the hydraulic insert and helps maintain correct internal pressure.
- The mechanical seal keeps water away from the motor bearings along the rotating shaft.
Together, these seals protect the motor, reduce the risk of drips in the technical room and support quiet, stable filtration.
Typical use and maintenance scenarios
The Pentair Superflo seal and o-ring kit P-SFL-OSET is designed for use during major wet end maintenance, repair after leaks or preventive
refurbishment of older pumps.
- Complete wet end service when the pump is opened to change the impeller or clean internal parts.
- Repair of visible leaks at the housing joint, around the lid or under the pump.
- Replacement of a worn or noisy mechanical seal to protect the motor bearings.
- Preventive maintenance on pumps that have operated for several seasons without seal renewal.
Compatibility with Pentair Superflo pumps
This gasket kit is intended specifically for Pentair Superflo circulation pumps that reference P-SFL-OSET as seal set in the spare parts list.
It follows the original dimensions and materials so the seals fit directly in the existing grooves and seats.
- Compatible with Superflo pumps listed with seal set P-SFL-OSET in the exploded view.
- Matches original references R357255, R355619, R154492 and R354545SP used in the Superflo wet end.
- Suitable for both standard chlorinated pools and most salt water pool installations.
For certainty, always confirm the pump model on the nameplate and check that P-SFL-OSET is the recommended seal set for your version.
Installation recommendations
Installing the Pentair Superflo seal and o-ring kit P-SFL-OSET should be carried out with the power supply isolated and the hydraulic circuit
fully depressurised. It is usually combined with cleaning of the wet end and inspection of the impeller and diffuser.
- Switch off and isolate the pump electrically, then close valves and drain the housing.
- Separate the wet end from the motor, remove the impeller and access the mechanical seal and housing joint.
- Replace the mechanical seal following the Pentair procedure, avoiding any contact with the polished faces.
- Fit the new housing and diffuser o-rings, ensuring they are clean, correctly seated and not twisted.
- Install the new lid o-ring in the cover groove and clean the sealing surface on the housing.
- Reassemble the pump, reconnect pipework, prime the wet end and check carefully for any signs of leakage.
Using a thin film of silicone based lubricant that is compatible with pool elastomers can make assembly easier and help extend the life of the
new o-rings.
Good practice for long seal life
With the Pentair Superflo seal and o-ring kit P-SFL-OSET correctly installed, a few simple habits will help the new seals deliver many seasons of
reliable service.
- Maintain balanced water chemistry to reduce chemical stress on rubber components.
- Avoid running the pump dry, which can overheat and damage the mechanical seal.
- Inspect the lid area and housing joint periodically for early signs of damp or deposits.
- Plan a full seal replacement at regular intervals on intensively used installations.
A complete gasket renewal with the Pentair Superflo seal and o-ring kit P-SFL-OSET restores the main sealing points in the pump wet end and
helps keep the filtration system efficient, quiet and well protected.
