


Waterway ClearWater II Filter Lock Nut | 550-7500
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Waterway ClearWater II Filter Lock Nut | 550-7500The OEM Waterway Filter Lock Nut 550 7500 is a heavy duty fastening component precision engineered for Waterway ClearWater II cartridge and D. E. filter systems. This lock nut anchors the filter lid firmly to the tank body, creating a leak resistant seal that is essential for maintaining correct filtration pressure and consistent performance. Made from rugged materials formulated to resist cracking, UV fading, and chemical degradation, it provides a
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.2 ★★★★★
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Product Reviews
★★★★★ 5
Save on filters forever
Color: CA9683
A perfect replacement for my auto' expensive paper filter. With a little care it will outlast the car
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 18, 2025
★★★★★ 5
Quality
Color: CA9683
Definitely a improvement from Oem, have it on both Fj and Tacoma, feels so much better driving
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 15, 2025
★★★★★ 5
It works
Color: CA9683
No complaints
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Reviewed in the United States on October 4, 2025
★★★★★ 4
It filters air.
Color: CA9683
This apparently fits in a car to filter air to the car. I put it in mine. But I cannot see it. So IDK if is even still there?
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2023
★★★★★ 5
Great purchase
Size: Accord 2018-22 1.5L Gas
Fit my 2018 Honda Accord as stated. Easy to install. Saved $50 doing it myself.
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Reviewed in the United States on February 7, 2026