Unicel C-5351 Filter | 135 SQ.FT. Waterway, Coast Spas Replacement
Unicel C-5351 Filter | 135 SQ.FT. Waterway, Coast Spas Replacement
Shasta Pool Supply offers the lowest prices on Waterway and Coast Spas replacement filters. The Unicel C-5351 filter delivers the best performing 135 sq.ft replacement cartridge. Additionaly, the quality components made in the U.S.A.
Buy Unicel C-5351 Filter
Shasta Pool Supply is where to buy Unicel filters. Find the Unicel C-5351 offering the lowest prices and fast shipping. All orders over $150 receive free shipping. Orders ship 2-day shipping. Therefore, customers receive the replacement filter fast and affordable.
Waterway and Coast Spas Replacement Filter
The C-5351 filter replaces the OEM Waterway and Coast Spas filters. Unicel's quality replacement parts make great options. Moreover, high quality OEM filters at lower prices.




Collapsible content

Key Features
- Best-in-Class Performance: Delivers unmatched filtration as a 135 sq. ft. replacement cartridge
- Made in the USA: Crafted with 50+ years of manufacturing expertise
Durable Construction: Features chemical-resistant end caps for a perfect fit and seal - Optimized Design: Sharp, uniform pleat folds maximize flow and minimize pressure loss
- Enhanced Stability: Strategically placed pleat support bands maintain optimal filtration efficiency
Specs
- Part Number: C_5351
- Length: 12.0
- Width: 12.0
- Height: 30.0

Unicel Cartridge
Superior Filtration for Your Spa
Elevate your spa experience with the C-5351 filter. Altogether, the ultimate choice for spa owners seeking top-tier water quality and efficiency. The Unicel C-5351 Filter stands out with its unique synthetic fiber construction. Therefore, providing maximum dirt-holding capacity and excellent chemical resistance. Its solid one-piece core ensures structural integrity, while the offset round openings optimize flow and strength.
Pool Supply Store
Limited Time Sale
Find the best pool equipment to complete your entire pool system. The lowest possible prices offered at fastest shipping.
-
Pentair IC40 Replacement Salt Cell Open Box
Regular price $1,249.00 USDRegular priceUnit price / per -
What our customers are saying
Easy. Seamless. Product was priced well, easy to order and shipped promptly. Will be a returning customer. Thank you for being a great company!
Easy. Seamless. Product was priced well, easy to order and shipped promptly. Will be a returning customer. Thank you for being a great company!
Gregory S.
Great. Received order timely. Product was as expected.
Great. Received order timely. Product was as expected.
MALINDA R.
Service was good. Good communication Fast shopping. No nonsense !!!!
Service was good. Good communication Fast shopping. No nonsense !!!!
Scott G.
FAQ
Our expert staff answers customer's most asked questions.
How frequently should I clean my filter cartridges?
The cleaning frequency is contingent on your filter's size. As a general guideline, initiate the cleaning process when the filter pressure exceeds the initial pressure by 10 psi. This ensures optimal filtration efficiency.
What are the ideal chemical ranges for my pool?
Achieving a balanced pool involves maintaining a pH range of 7.2–7.8, total alkalinity between 80–120 ppm, calcium hardness at 180–220 ppm, and cyanuric acid (stabilizer) within 30–50 ppm. Chlorine levels should consistently fall within the 1–3 ppm range, by may need to be increased as CYA levels go above 60 PPM.
Does a solar panel for my pool effectively save energy?
Absolutely! The installation of a solar pool heater can significantly reduce your swimming pool heating costs, providing an energy-efficient solution.
Learning Center
Blog posts
The latest news and guides making buying and maintaining pool equipment easier.
-
Robotic vs Suction Pool Cleaner: Which Saves Mo...
Facebook Pinterest Twitter Email The $1,500 price difference between robotic and suction pool cleaners might seem like a clear choice at first glance. Robotic pool cleaners can cost up to...
Robotic vs Suction Pool Cleaner: Which Saves Mo...
Facebook Pinterest Twitter Email The $1,500 price difference between robotic and suction pool cleaners might seem like a clear choice at first glance. Robotic pool cleaners can cost up to...
Learn More -
How to Clear a Cloudy Pool Fast: A Pool Pro's S...
Cloudy pool water poses a serious health risk. Dangerous bacteria like E. coli and Legionella thrive in murky conditions. The problem goes beyond looks. Murky water stains pool walls and...
How to Clear a Cloudy Pool Fast: A Pool Pro's S...
Cloudy pool water poses a serious health risk. Dangerous bacteria like E. coli and Legionella thrive in murky conditions. The problem goes beyond looks. Murky water stains pool walls and...
Learn More -
8 Types of Pool Cleaners Compared: Costs, Featu...
Facebook Pinterest Twitter Email A clean, sparkling pool can boost your property value by 7.7%. Finding the right pool cleaner makes a huge difference in protecting your investment. Pool cleaning...
8 Types of Pool Cleaners Compared: Costs, Featu...
Facebook Pinterest Twitter Email A clean, sparkling pool can boost your property value by 7.7%. Finding the right pool cleaner makes a huge difference in protecting your investment. Pool cleaning...
Learn More -
How to Open Your Pool for Spring: A Pool Pro's ...
Did you know that opening your pool early in spring can actually prevent algae blooms? That's right, the cooler spring water combines with proper chemical treatments and creates an environment...
How to Open Your Pool for Spring: A Pool Pro's ...
Did you know that opening your pool early in spring can actually prevent algae blooms? That's right, the cooler spring water combines with proper chemical treatments and creates an environment...
Learn More -
Warning Signs You Need a New Pool Filter Cartridge
Pool filter cartridges typically last one to three years. However, many pool owners aren't sure about the right time to replace their cartridges. Some people keep them for 3-5 years...
Warning Signs You Need a New Pool Filter Cartridge
Pool filter cartridges typically last one to three years. However, many pool owners aren't sure about the right time to replace their cartridges. Some people keep them for 3-5 years...
Learn More