Description
Pentair Superflo pump cover R350091
The Pentair Superflo pump cover R350091 is the original transparent lid for the prefilter housing of Pentair Superflo pool pumps.
It closes the strainer basket compartment and, together with the lid O-ring and locking ring, ensures a watertight seal so the pump
can prime correctly and run without drawing in air.
Main features of the Pentair Superflo pump cover
- Original Pentair transparent lid for Superflo pump strainer housing.
- Clear design for easy visual inspection of water level and basket condition.
- Designed to work with the dedicated lid O-ring and locking ring.
- Resistant to normal pool temperatures and chemical exposure.
Function and role in the filtration system
The pump cover closes the prefilter section that houses the strainer basket. When correctly installed and sealed, it keeps the suction
side airtight so the Superflo pump can maintain a stable prime. A clear, undamaged lid also allows quick checks of debris in the basket
and the presence of air bubbles, making daily operation and troubleshooting easier.
- Seals the prefilter compartment to prevent air entry on the suction side.
- Allows you to see the basket and water level at a glance.
- Supports quiet, efficient filtration by helping the pump stay fully primed.
Compatibility and applications
The Pentair Superflo pump cover R350091 is designed specifically for Superflo circulation pumps that use the matching strainer housing,
locking ring and O-ring. It follows the original diameter, profile and seating surface so it fits directly on the factory pump body.
- Compatible with Pentair Superflo pumps that specify reference R350091 as pump cover.
- Ideal as a replacement for cracked, scratched or cloudy original lids.
- Recommended when refurbishing the prefilter section together with a new locking ring and gasket.
When to replace the Pentair Superflo pump cover
Although the cover is a passive plastic component, its condition has a direct impact on sealing and priming. Over time, lids can suffer
from stress, UV exposure and constant tightening and loosening for basket cleaning.
- Cracks or star shaped fractures around the centre or edges of the lid.
- Excessive scratching or clouding that makes it hard to see inside the basket area.
- Persistent air leaks and loss of prime even after replacing the O-ring and checking pipework.
- Broken or worn contact surfaces where the locking ring presses on the lid.
Installation and handling guidelines
Fitting the Pentair Superflo pump cover R350091 is simple and is usually done during routine cleaning of the strainer basket. Correct
handling protects the new lid and ensures a long lasting, airtight seal.
- Switch off the pump and make sure it cannot start while you are working.
- Unscrew and remove the locking ring, then lift off the existing lid.
- Clean the sealing surface and inspect or replace the lid O-ring if necessary.
- Position the new R350091 cover on the strainer housing, making sure it sits evenly on the gasket.
- Screw the locking ring back on by hand until the lid is held firmly, without using tools or over tightening.
After refitting, restart the filtration system and check that the pump primes quickly and that no air bubbles appear in the prefilter
under normal operation.
Care and good practice
With a few simple habits, the new Pentair Superflo pump cover can stay clear and functional for many seasons.
- Rinse dirt and sand away from the sealing area before closing the lid.
- Use a suitable silicone based lubricant on the O-ring to reduce friction and wear.
- Avoid hitting the lid with tools or pool equipment, especially in cold weather when plastic is more brittle.
- Protect the pump from direct sunlight where possible to slow down UV ageing of the plastic.
With a correctly installed Pentair Superflo pump cover R350091, the prefilter section remains easy to inspect and reliably sealed,
supporting quiet, efficient operation of the pool filtration system.
