Pentair 355385 motor support for Challenger, Pinnacle and Waterfall pool pumpsPentair Motor Support for Challenger, Pinnacle and Waterfall Pumps, 355385$2399
Pentair 355385 motor support for Challenger, Pinnacle and Waterfall pool pumps
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Pentair Motor Support for Challenger, Pinnacle and Waterfall Pumps, 355385

Ask a questionMPN 355385
$2399
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Quick overview

  • Genuine Pentair Factory part number 355385 for the Challenger family of pumps.
  • Five and five eighths inch diameter Listed at 5-5/8 in, so check the diameter of the piece you are replacing.
  • Joins motor to wet end The support is the structural link between the motor face and the pump housing.
  • Challenger, Pinnacle and Waterfall Listed across the Challenger, Pinnacle and Waterfall pump lines.
  • A motor swap part Worth replacing while the motor is off, because a corroded support never comes apart cleanly the second time.
  • Sold on its own Supplied as the support only, without motor, seal or hardware.
Full description and specifications ↓

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Product details

The Pentair 355385 is the motor support for the Challenger, Pinnacle and Waterfall pumps, listed at 5-5/8 inches in diameter and also described as a motor adapter.

Where it sits

The support is the structural piece between the motor and the wet end. It carries the motor weight and holds the shaft square to the housing, which is what keeps the mechanical seal running true. Once a support has corroded thin or cracked, the motor no longer sits where the design intends and the seal pays for it.

Worth doing during a motor change

This is the kind of part to replace while the pump is already apart. A support that has spent years at the wet end of the pump is usually pitted, and it will be even harder to separate next time. Compare the 5-5/8 inch diameter to the piece you are removing before ordering, and note that the support ships on its own without motor, seal or hardware.

Specifications
Brand Pentair
Manufacturer part number 355385
UPC 788379700553
Type Motor support
Also described as Motor adapter
Diameter 5-5/8 in
Part type Pool pump part
Fits Pentair Challenger, Pinnacle and Waterfall pumps
Shipping weight 0.05 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

What does the motor support do?
It carries the motor and holds it in the correct position against the pump housing, so the shaft and seal run true.
Which pumps is it listed for?
The Pentair Challenger, Pinnacle and Waterfall pumps.
Is a motor support the same as a motor adapter?
Both names are used for this piece. Pentair part 355385 is listed as a motor support and described as a 5-5/8 inch diameter motor adapter.
Should I replace it during a motor change?
It is worth doing. Supports corrode at the joint between motor and wet end, and one that is already pitted will fight you the next time the pump comes apart.
Ask your own question