Pentair Dynamo Pump Parts

12 products

Have the Dynamo's horsepower and model number in hand before you order, because Pentair sizes the wet end to the motor. The 1/2, 3/4 and 1 HP pumps each take their own impeller, and a 3/4 HP needs a different bracket diffuser from the 1 and 1-1/2 HP. The strainer pot, basket, clear lid and lid o-ring are the same on every size, so those parts are the easy ones to match.

Which horsepower is your Dynamo?

The horsepower is on the motor's label. Pentair's manual gives one impeller and one diffuser to the 1 and 1-1/2 HP.

Pentair Dynamo Pump exploded parts diagram with numbered keys23456789101112131415
Numbers are the manufacturer's own.

Bracket diffuserPentair 354632, 354633

Pentair 354632 is not sold on Active yet.

Nut, 10-24Pentair 354542

Pentair 354542 is not sold on Active yet.

Bracket diffuser o-ring, 3/16 in.Pentair 354634

Pentair Diffuser O-Ring for Dynamo

Pentair OEM

$699 In stock

Shaft seal, 5/8 in.Pentair 354545S

Pentair Mechanical Shaft Seal, 5/8", 354545S

Pentair OEM

$3499 In stock
U.S. Seal Heavy Duty Mechanical Seal Assembly (PS200), PS-3867

GenericReplaces 354545S

$1499 In stock

ImpellerPentair 353002, 354552, 355122

Pentair Dynamo Impeller Assembly for 1 HP and 1-1/2 HP, 355122

Pentair OEM

$4199 In stock

Housing bodyPentair 354630

Pentair Dynamo Body Housing, 354630Z

Pentair OEM

$11299 In stock

Screw, 10-24 x 1-1/2Pentair 354541

Pentair 354541 is not sold on Active yet.

Drain plugPentair U178-920P

Sta-Rite Drain Plug with O-Ring, 1/4 in. NPT, U178-920P

Pentair OEMTwo per pump

$799 In stock

Housing o-ringPentair 273062

Pentair 273062 is not sold on Active yet.

Strainer potPentair 354530

Pentair Dynamo Pot Trap Basket Housing, 354530Z

Pentair OEM

$11099 In stock
Custom Molded Products Pentair Dynamo Pump Pot 354530 | 25302-054-000

GenericReplaces 354530

$6399 Out of stock

Basket with handlePentair 354548

Pentair Dynamo Basket with Handle, 354548

Pentair OEM

$2999 In stock

Lid o-ringPentair 354533

Pentair Lid O-Ring, Dynamo, 354533

Pentair OEM

$1599 In stock

LidPentair 354531, 354113

Pentair OEM Lid, Dynamo Strainer Pot, 354531Z

Pentair OEMUniversal

$5799 In stock
CMP Clear Strainer Pot Lid for Pentair Dynamo Pumps, Replaces 354531, 25307-000-020

GenericReplaces 354531

$2399 In stock

Pot assemblyPentair 354103

Pentair Dynamo Strainer Pot Assembly, 354103

Pentair OEMPot, basket, lid and o-ring

$23299 In stock

Drawing and key numbers from Pentair's Dynamo pump replacement parts sheet, Pentair and Sta-Rite. Generic and kit parts sit at the key for the manufacturer's part they replace.

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About Pentair Dynamo Pump Parts

Replacement parts for the Dynamo, the above ground pump Pentair lists under both the Pentair and Sta-Rite names: the strainer pot and pot assembly, the clear lid and its o-ring, the basket, the housing body, the 1 HP impeller, the bracket diffuser o-ring, the on/off canopy switch and the three position switch for the two speed pump. Every part here is Pentair's own.

Motors are on pool pump motors, and parts for every make of pump are on pump parts and motors. Whole Dynamo pumps are with the above ground pool pumps, and parts for Hayward's above ground pumps are on Hayward Power-Flo pump parts.

Two Pool School guides go with these parts. After a new lid O-ring, basket or shaft seal, how to prime a pool pump covers a pump that sits below the water line, as the Dynamo usually does on an above ground pool. And before ordering a motor for the Dynamo, motor or whole pump has the tests that tell a failed motor from a jammed impeller.

Questions about Pentair Dynamo Pump Parts

Which impeller fits my Pentair Dynamo pump?

The one for its horsepower. Pentair lists 353002 for the 1/2 HP, 354552 for the 3/4 HP and 355122 for the 1 HP, and its manual also gives 355122 for the 1-1/2 HP. The bracket diffuser around the impeller splits the same way: 354632 on a 3/4 HP, 354633 on the 1 and 1-1/2 HP. The 1 HP impeller is the one carried here. Pentair asks for the horsepower, model number and serial number from the pump's label with any parts order.

My Pentair Dynamo pump will not prime. What should I check?

Pentair's own list: water in the strainer pot, a lid screwed down tight, a lid o-ring with no damage, pool water up to the skimmer, clean pump and skimmer baskets, every valve open, and no air leak on the suction side. A two speed Dynamo has to be on high to prime. Pentair says to switch it off if it has not primed within five minutes, and that a pump set more than 5 feet above the water will be slow to prime. The lid o-ring is 354533.

Why is water leaking between the motor and the pump on my Pentair Dynamo?

Water at that joint comes from the mechanical shaft seal or the o-ring between the bracket diffuser and the housing. Pentair lists one 5/8 inch seal, 354545S, for every Dynamo size, and warns that running the pump dry can damage the seals and let water out. The seal changes without cutting the pipes: six bolts free the motor, bracket diffuser and impeller, and the ceramic half presses into the bracket diffuser. Pentair also asks you to clean the 3/16 inch bracket o-ring, 354634, and see that it is seated before bolting back up.

Which on/off switch fits my Pentair Dynamo?

That depends on when the pump was built and how many speeds it has. For Dynamo pumps with the canopy and 25 foot cord, Pentair lists the 350444 on/off canopy switch for pumps built before April 2013, and a canopy with its own switch, 350481, for later ones. A two speed Dynamo takes the 356546 three position switch for high, low and off. Both the 350444 and the 356546 are listed here.

The lid on my Pentair Dynamo strainer pot is cracked. Do I need the whole pot?

No, the lid comes on its own. Pentair's universal Dynamo lid is 354531, with a chemical resistant version, 354113, and the lid o-ring is 354533. Pentair's manual asks you to look that o-ring over each time you clean the basket, which it suggests twice a week, and to replace it if it is damaged. Reach for the 354530 pot, or the 354103 pot assembly, only when the pot itself has cracked.

Do Sta-Rite Dynamo pumps take the same parts as a Pentair Dynamo?

Yes. Pentair publishes one Dynamo parts list, headed as Pentair and Sta-Rite replacement parts, and its catalog shows the pump under both brand names, so a number on that list fits either badge. The three position switch here is listed for the Sta-Rite Dynamo by name. Read the horsepower off the label either way, since the impeller and diffuser still follow the size.