Description
Pentair diffuser R355360 for Superflo 2 HP to 3 HP pumps
The Pentair diffuser R355360 for Superflo 2 HP to 3 HP pumps is the original hydraulic insert that surrounds the impeller in higher power
Superflo pool pumps. It guides the water leaving the impeller and helps convert speed into pressure, so the pump can deliver the required
flow to the filter with stable performance and low noise.
Main features of the Pentair diffuser R355360
- Genuine Pentair diffuser for Superflo pumps from 2 HP to 3 HP.
- Internal guide vanes designed for efficient pressure build up.
- Direct fit replacement using the original housing and screws.
- Durable construction for everyday use in pool plant rooms.
Function in the Superflo pump hydraulic circuit
Inside the wet end, the diffuser R355360 sits around the impeller and shapes the water flow as it exits the impeller blades. Correct diffuser
geometry is essential for the pump to reach its design pressure and to keep operation smooth and quiet during filtration.
- Surrounds the impeller to control water leaving the impeller vanes.
- Helps convert velocity energy into useful discharge pressure.
- Supports good priming behaviour and reduces turbulence and noise.
- Keeps internal clearances stable to protect the impeller from contact.
Compatibility and pump range
The Pentair diffuser R355360 is designed for the higher power versions of the Superflo range. It matches the original internal profile,
locating tabs and fixing holes so it can be installed directly in place of a worn or damaged diffuser without modifications.
- Suitable for Pentair Superflo pumps rated from 2 HP up to 3 HP.
- Uses the original diffuser screw pattern inside the pump housing.
- Compatible with other original Pentair wet end parts such as housing, impeller and seal plate.
For correct identification, always check the pump data plate and parts diagram. If the diffuser is listed under reference R355360 for your
Superflo model, this is the matching replacement part.
When to replace the Superflo diffuser R355360
Even though the diffuser has no moving parts, it operates under continuous flow and pressure and can be damaged by cavitation, debris or
dry running. A worn diffuser can reduce the pump flow, increase noise and lead to unstable filtration performance.
- Visible cracks, chips or broken edges on the diffuser body or vanes.
- Erosion marks, pitting or rough surfaces caused by cavitation or sand.
- Warping or deformation that affects the gap between impeller and diffuser.
- Loss of pressure or flow once the impeller, basket and pipework have been checked.
Installation guidelines
Fitting a new Pentair diffuser R355360 is part of a normal wet end service on a Superflo pump. The work should always be carried out with
the electrical supply disconnected and the hydraulic circuit depressurised.
- Switch off and isolate the pump from the power supply and close valves on suction and return lines.
- Drain the pump housing and separate the wet end from the motor following the manufacturer procedure.
- Remove the impeller carefully and take out the old diffuser and screws.
- Clean the contact surfaces in the housing and check the condition of seals and mechanical seal.
- Position the new R355360 diffuser correctly, align the locating features and refit the diffuser screws evenly.
- Reassemble the pump, reconnect the pipework, prime the wet end and check for normal flow and quiet running.
Good practice for long term performance
Good operating conditions help the new Pentair diffuser R355360 and the rest of the wet end deliver many seasons of reliable service in a
Superflo 2 HP to 3 HP installation.
- Keep the skimmer and pump basket clean to limit the risk of cavitation.
- Maintain the correct water level in the pool so the pump does not run dry.
- Check for unusual noise or vibration and investigate early to avoid internal damage.
- Plan diffuser inspection during major services such as mechanical seal or impeller replacement.
With a correctly installed Pentair diffuser R355360 and sound impeller, housing and seals, Superflo 2 HP to 3 HP pumps recover their
original hydraulic efficiency and provide stable, quiet filtration for residential pools.
