Dynamo Pump 1 HP 2 Spd. (no cord) - 340204


Model # 340204

By Pentair Pool Products

  4.5 Average  



Model # 340204

Warranty 1 Year

Alternate Part #'s PEN340204

Product Description

Inyo Recommended Pumps

Pentair Dynamo Above Ground Pool Pump

Dynamo® pumps are an example of excellence in hydraulic engineering for that elusive combination of high efficiency and longevity. The key is a proprietary internal design evolved and refined over the past 40 years. The result is the ability to minimize friction and turbulence as water moves through the pump. Other pumps simply work harder, consume more energy and make more noise. By contrast, Dynamo pumps are so efficient they typically require lower horsepower motors to deliver required flow—this slashes energy costs. Superior efficiency also translates directly into quieter operation. Put a Dynamo to work on your pool for maximum performance and value over the long term.

Features include:

  • Unique diffuser and impeller provide excellent pressure performance across a wide range of desired flow rates— the hydraulic efficiency that keeps operating costs at a minimum.
  • Self-priming design protects internal components and ensures long life.
  • Components are constructed from fiberglass-reinforced material for superior strength, durability and resistance to aging and the elements.
  • Three horsepower ratings available to precisely match up with your pool’s circulation needs.

You can depend on Dynamo® aboveground pumps year after year because they are designed to perform and built to last. These pumps feature durable components of fiberglass reinforced thermoplastic to resist corrosion and fatigue for extended service life.

  • Available in a variety of models to meet your exact requirements—single-speed with cord and on/off switch; single-speed with cord, base and on/off switch; single or two-speed without cord.
  • Every Dynamo pump is performance and pressure tested prior to shipment to ensure superior quality.
  • One-year limited warranty.

Performance Curve


Product Specifications

1 HP
115 V
Port Size:
1-1/2 in.
Cord Type:
Not included
Cord Length:
Not included ft.

?     Asked on 8/16/2017 by Paul

I saw you answered a previous question regarding a speed switch (a toggle between low and high). Is there also an On/Off switch at the motor, or does the speed switch have a "Center Off" position (i.e. High/Off/Low)? Thanks

A  Answered on 8/16/2017 by InyoPools Product Specialist Alex V.

Paul, The switch is a 3 position switch (Hi/Low/Off).

?     Asked on 5/14/2017 by David

Hello, I see no indication of an on-off/speed change switch in the description, and the picture does not show the rear of the motor. So, my question is is there an on-off/speed change switch on the motor? If not, how does one do these things? Thanks.

A  Answered on 5/14/2017 by InyoPools Product Specialist Hector F.

There is a toggle switch located on the back end of the motor for choosing the speeds.

?     Asked on 4/13/2017 by Sean

Any reason this can't be used for inground as it is self-priming and contains a diffuser? Some other sites claim so. I am replacing a hayward c48k2n143b1, 1 HP and looking for efficient 2 speed. Piping is 1.5" and my outlet is 125v. My pool is a simple, in-ground, rectangular 32X18, 16,500 gallons, 4.5 ft at deepest section. Pump and filter about 7 feet of pool, 1 foot off ground on slab. One skimmer line and no heater etc. Sand filter is Sta-Rite S7S50. Am I missing something?

A  Answered on 4/14/2017 by InyoPools Product Specialist Scott W.

It should work since your resistance is so minimal.

?     Asked on 12/6/2016 by John Walsh

I have a 1 HP full rated Magnetek Century E-Plus B841 pump that is grinding loudly. Thinking the motor is bad and seeing as I'm replacing it I may as well go with a 2-speed model. Is this pump a direct replacement for that one?

A  Answered on 12/6/2016 by InyoPools Product Specialist Lennox H.

Hi, John. You can replace the B841 with a dual speed motor. You can use either the 2-Green Motor (B2982T) which has a built-in controller or the B982 motor without a controller. You will need to purchase the T106R Timer to control the B982 motor.

?     Asked on 4/3/2015 by Tom

What is the opening on the intake and discharge? I need 1.5".

A  Answered on 4/4/2015 by InyoPools Product Specialist Robert M.

Hello Tom - The intake and discharge are 1.5" on the Dynamo pump.


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