Description
Pentair mounting plate screws for Challenger, Pinnacle, Whisperflo and Superflo pumps R354290
The Pentair mounting plate screws for Challenger, Pinnacle, Whisperflo and Superflo pumps R354290 are original fasteners used to fix the pump
mounting plate or base to the motor and wet end assembly. With the correct thread, length and head profile, they ensure that the pump sits
securely on its support and that the hydraulic body remains correctly aligned during daily operation.
Main features of the Pentair mounting plate screws
- Original Pentair mounting plate screw set for multiple pump ranges.
- Designed to match the factory mounting plate and motor fixing points.
- Manufactured to withstand vibration and humid technical environments.
- Supplied as a dedicated spare set for pump refurbishment and repairs.
Function and role in the pump assembly
The mounting plate screws R354290 clamp the pump base or mounting plate firmly to the motor and, depending on the configuration, to the wet
end. By using the correct original screws, the pump remains stable on its support, reducing vibration, mechanical stress on the pipework and
the risk of misalignment between motor shaft and hydraulic section.
- Secure the mounting plate to the motor and pump foot.
- Help keep the pump level and correctly oriented on the base.
- Contribute to quiet running by limiting vibration and movement.
Compatibility and typical applications
This screw set is intended for a family of Pentair pumps that share a common base or mounting plate design. It follows the original
dimensions and thread so it can be fitted directly in place of worn, missing or non original screws.
- Compatible with selected Pentair Challenger pumps.
- Compatible with Pentair Pinnacle pumps using the same mounting plate.
- Compatible with Pentair Whisperflo and Superflo pumps listed for R354290.
- Ideal when rebuilding a pump base or replacing a damaged mounting plate.
Before ordering, always confirm your pump model on the identification plate and check that R354290 appears as the mounting plate screw
reference in the official spare parts breakdown.
When to replace the mounting plate screws
Mounting plate screws operate in a humid, sometimes corrosive environment and are exposed to constant vibration. Over time they can
corrode, seize or suffer damaged heads, making adjustment or removal difficult and reducing the quality of the fixing.
- Visible rust, pitting or discolouration on the screw shank or head.
- Rounded or damaged heads that no longer accept the correct tool.
- Missing screws or mismatched hardware of incorrect size or quality.
- General refurbishment where all structural fixings are renewed preventively.
Installation guidelines and good practice
Installing new Pentair mounting plate screws for Challenger, Pinnacle, Whisperflo and Superflo pumps R354290 is usually done when the
pump is being repositioned, the base is replaced or the unit is being fully overhauled. Work should always be carried out with the pump
electrically isolated and the hydraulic system depressurised.
- Switch off and isolate the power supply to the pump before starting any work.
- Support the pump and disconnect pipework if necessary to access the mounting plate fixings.
- Remove old screws, clean the contact surfaces and check the condition of the base or mounting plate.
- Position the pump correctly on the base and insert the new R354290 screws in the original locations.
- Tighten the screws evenly so the pump sits level and does not rock on the support.
- After reassembly, reconnect pipework, restore power and check that the pump runs smoothly without excessive vibration.
With original Pentair mounting plate screws correctly installed, Challenger, Pinnacle, Whisperflo and Superflo pumps benefit from stable
support, reduced stress on unions and a more reliable long term installation.
