Keep your Hayward NorthStar pool pump running at peak performance with the SPX4000SA2 Seal Assembly. Shasta Pool Supply extends your pump’s life and keeps your pool system performing like new. Specifically, this genuine Hayward replacement part prevents leaks, protects internal components, and ensures smooth, efficient pump operation.
- Prevent Leaks: Create a tight, watertight seal that stops water from escaping around the pump shaft.
- Protect Bearings and Motor: Block moisture from entering the motor assembly and causing costly damage.
- Maximize Efficiency: Maintain consistent suction and water flow for reliable pool circulation.
- Compatibility: Fits Hayward NorthStar pump models SP4000, SP4000X, and SP4000EE series

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Find the best pool equipment to complete your entire pool system. The lowest possible prices offered at fastest shipping.
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Open Box Pentair Plus40 Salt Chlorine Generator Cell 523735-EC
Regular price $1,509.00 USDRegular priceUnit price / perSale price $1,509.00 USDSold out -
Pentair IntelliCenter Personality Upgrade Kit i8P | Single Body 521910
Regular price $599.00 USDRegular priceUnit price / per$1,995.00 USDSale price $599.00 USDSale -
What our customers are saying
Ordering and payment was simple and easy to do. Dan is wonderful.
Ordering and payment was simple and easy to do. Dan is wonderful.
DeeDee B
Called the Phoenix office and gentleman who assisted me was very helpful and confirmed they had what I was looking for.
Called the Phoenix office and gentleman who assisted me was very helpful and confirmed they had what I was looking for.
Douglas S
Easy to order and arrived on time.
Easy to order and arrived on time.
David F
FAQ
Our expert staff answers customer's most asked questions.
Why am I being charged shipping for a return?
For detailed information regarding shipping charges for returns, please review our shipping policy.
What shipping options do you offer?
We offer local pick-up at both our Phoenix and Mesa locations, along with Free Shipping on orders $150 or more. To learn more about our shipping options, click here.
How will I know when my order is ready for pickup?
You'll receive an email notification when your order is ready to be picked up.
Learning Center
Blog posts
The latest news and guides making buying and maintaining pool equipment easier.
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What are Our Expert Picks for the Best Variable...
Variable speed pool pumps change the economics of owning a pool. They can reduce energy use by up to 90% and still keep your pool properly circulated. In warm weather...
What are Our Expert Picks for the Best Variable...
Variable speed pool pumps change the economics of owning a pool. They can reduce energy use by up to 90% and still keep your pool properly circulated. In warm weather...
Learn More -
Do You have to Cover a Pool in the Winter?
Winter in Arizona is milder than many parts of the country. However, we hear from pool owners every year: “Do I really need to cover my pool?” Many homeowners across...
Do You have to Cover a Pool in the Winter?
Winter in Arizona is milder than many parts of the country. However, we hear from pool owners every year: “Do I really need to cover my pool?” Many homeowners across...
Learn More -
What Raypak Heater Error Codes Mean and How to ...
If you’ve ever glanced at your Raypak heater and seen codes like BD1, PRS, or HL1 blinking back at you, we understand how confusing they can be. Half the time,...
What Raypak Heater Error Codes Mean and How to ...
If you’ve ever glanced at your Raypak heater and seen codes like BD1, PRS, or HL1 blinking back at you, we understand how confusing they can be. Half the time,...
Learn More



