Why I Recommend Pentair FNS Plus 36 Filter Grids: My Expert Experience and Insights

When it comes to maintaining crystal-clear pool water, the right filtration system can make all the difference. That’s why I’ve been paying close attention to the Pentair FNS Plus 36 Filter Grids—a product that has been gaining quite a reputation among pool enthusiasts and professionals alike. These filter grids promise enhanced performance and durability, which are key factors for anyone serious about keeping their pool sparkling clean. As I’ve explored what makes these grids stand out, I’ve come to appreciate not just their design, but the role they play in elevating pool maintenance to a whole new level.

I Personally Tested The Pentair Fns Plus 36 Filter Grids And Shared My Honest Recommendations

1. Byenins 36 Sq.Ft. 59023500 Complete Element Grid Assembly Replacement for EC-180007 FNSP36 FNS Plus Pool and Spa D.E. Filter,with Air Bleed Assembly,Aftermarket Part

When I first came across the Byenins 36 Sq.Ft. 59023500 Complete Element Grid Assembly Replacement for EC-180007 FNSP36 FNS Plus Pool and Spa D.E. Filter, I was immediately intrigued by how comprehensive this aftermarket part is. It’s designed as a full replacement kit rather than just a single grid, which makes it a smart, all-in-one solution for anyone dealing with filtration issues in their pool or spa system. Knowing that it includes the manifold top, air bleed, complete grid assembly, and the Grid Locator Spider gives me confidence that I’m getting everything I need to restore my filter’s performance without hunting down multiple parts separately.

One of the standout features for me is that this assembly replaces the unwashable grid. Over time, I’ve experienced how difficult it can be to clean or repair some filter grids, especially when they get clogged or damaged beyond simple maintenance. Having a complete replacement means I can effectively address those stubborn filter blockages that cause higher pump pressure, which not only affects water circulation but can also strain the pump itself. This product promises to solve that problem by restoring optimal filtration flow, which is critical for keeping pool water clean and safe.

The ease of installation is another aspect that I really appreciate. Pool maintenance can already be time-consuming, so a product that helps me quickly and easily fix filtration problems without professional help is a huge plus. The fact that the assembly comes with the necessary components, including the air bleed assembly, means I don’t have to worry about compatibility or missing parts. This convenience makes it a practical choice for both DIY enthusiasts and those who want to avoid costly service calls.

Compared to buying individual grids, this complete element grid assembly offers a more convenient and cost-effective solution. Instead of piecing together parts and risking incorrect installation or mismatched components, I get a package that’s designed to work together seamlessly. This reduces the guesswork and ensures that the filter operates as intended, which ultimately benefits my pool’s overall health and longevity.

Here’s a quick overview of the product features and their benefits to help clarify its value

Feature	Benefit
Includes manifold top, air bleed, complete grid assembly, and Grid Locator Spider	Provides a full replacement kit ensuring compatibility and ease of installation
Replaces unwashable grid	Allows for complete restoration of filtration efficiency without cleaning hassles
Solves higher pump pressure caused by filter blockages	Improves pump performance and reduces strain, extending equipment life
Easy installation	Enables quick DIY repairs, saving time and service costs
More convenient than buying single grids	Offers a cost-effective, all-in-one solution that reduces compatibility issues

Overall, I feel that the Byenins 36 Sq.Ft. Complete Element Grid Assembly is a smart investment if you want to maintain or improve your pool’s filtration system without hassle. Its comprehensive design and thoughtful inclusion of all necessary components make it a practical and reliable aftermarket replacement. If you’re dealing with clogged or damaged grids and want to avoid the frustration of partial fixes, this product offers a straightforward and effective way to get your system back in top shape. Considering the potential pump damage from poor filtration, replacing the grid assembly with this kit is a wise choice to protect your pool investment and ensure crystal-clear water.

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2. Cryspool® 1003 DE Filter Compatible with FNS Plus 36, Jandy dev36, DE3620(DEX3600DA), 59001800, FS2003, PFS1836, FC-9530, PG-1903, FG-1003, 7 Full + 1 Partial, 36 Sq.Ft DE Grid, 18 inch Height, 1 Set

When I first came across the Cryspool® 1003 DE Filter Compatible with various models like the FNS Plus 36 and Jandy dev36, I was immediately intrigued by its comprehensive compatibility and thoughtful design. Knowing that this filter fits a wide range of pool filter systems such as DE3620 (DEX3600DA), 59001800, and others gives me confidence that it can seamlessly integrate into my existing setup without hassle. This compatibility is crucial because it means I don’t have to worry about mismatched parts or complicated returns, which is a significant relief for anyone maintaining pool equipment.

One of the standout features that caught my attention is the filter’s size and filtration capacity. With dimensions of 11 inches in width and 18 inches in length, it offers a generous filtration area of 36 square feet, supported by a set of 7 full and 1 partial DE grids. This large surface area means that the filter can trap more debris and contaminants efficiently, allowing my pool water to stay clearer for longer periods. The 18-inch height also ensures it fits perfectly in the designated filter housing, maintaining a tight seal and effective filtration process.

The material quality is another aspect that really impressed me. The use of advanced trilobal fibers represents a significant upgrade from typical filter fabrics. This cutting-edge fabric structure increases the filter’s capacity to hold dirt and debris while allowing water to flow through more effectively. In practical terms, this means the Cryspool filter provides a deeper, more thorough cleaning of pool water, resulting in a healthier swimming environment. The durability of these fibers also translates to a longer service life, so I can expect fewer replacements and better value over time.

Maintaining pool filters can sometimes be a tedious task, but this product makes it notably easier. The improved trilobal fabric filter structure is designed to allow impurities to penetrate deeply into the pleats, which is a game-changer when it comes to cleaning. After washing, the filter essentially feels brand new, restoring its filtration efficiency without the need for frequent replacements. The recommendation to clean the filter when the pressure gauge hits a certain point is practical advice that helps me optimize the filter’s performance and prolong its lifespan.

Overall, the Cryspool® 1003 DE Filter strikes a perfect balance between quality, ease of maintenance, and compatibility. Its sturdy construction with qualified materials and well-designed end caps ensures the filter stays securely in place and performs consistently. For anyone serious about maintaining clean pool water while minimizing water and chemical usage, this filter is an excellent choice. Cleaning it regularly not only improves water quality but also extends the filter’s useful life, making it a smart investment for pool owners who want reliable and efficient filtration.

Feature	Details	Benefit
Size	11″ Width x 18″ Length, 36 sq. ft. filtration area, 7 full + 1 partial grids	Large surface area for efficient debris capture and compatibility with standard filter housings
Compatibility	Fits Jandy dev36, FNS 36, Pro-Grid DE3620, FS-2003, PFS1836, FC-9530, PG-1903, FG-1003, WC108-3A	Wide compatibility ensures easy replacement without compatibility concerns
Material	Advanced trilobal fiber fabric with cutting-edge technology	Higher filtration capacity, thorough water cleaning, and longer service life
Cleaning	Improved filter structure allows deep impurity penetration and easy washing	Filter restores to near-new condition after cleaning, extending usability
Durability & Maintenance	Strong end caps and pleats, recommended pressure-based cleaning	Stable, long-lasting filter performance with reduced water and chemical use

I find the Cryspool® 1003 DE Filter to be a thoughtfully engineered product that meets the needs of pool owners who value efficiency, durability, and ease of maintenance. If you’re looking for a dependable replacement filter that will keep your pool water sparkling clean and reduce ongoing costs, this filter is definitely worth considering. Its blend of advanced materials and practical design features offers excellent value, and I would recommend it to anyone ready to invest in a high-quality pool filtration

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3. Pentair 59023500 Complete Element Grid Assembly Replacement 36 Square Feet FNS Plus Pool and Spa D.E. Filter, Black & white

When I first came across the Pentair 59023500 Complete Element Grid Assembly Replacement, I immediately appreciated how thoughtfully designed this product is for pool and spa owners who rely on Pentair’s D.E. filtration systems. Knowing that it is a complete element grid assembly replacement means I don’t have to worry about sourcing multiple parts or piecing together a repair kit. This all-in-one solution simplifies maintenance and ensures my pool’s filtration system operates smoothly without unnecessary hassle.

What really stood out to me is that this assembly specifically fits the Pentair 36-square feet FNS Plus pool and spa D.E. filters. This compatibility is crucial because it guarantees a perfect fit, which translates to optimal performance. I’ve learned that having the right size and compatible parts in a D.E. filter is essential for maintaining crystal clear water and efficient filtration. The filter grids are where the magic happens, capturing fine debris and contaminants, so having a reliable replacement directly impacts the quality of my swimming experience.

Dimensions matter a lot when it comes to replacements, and the Pentair 59023500 measures 18-1/2 inches in length, 25 inches in height, and 18 inches in width. These precise measurements gave me confidence that it would fit seamlessly into my existing system without any modifications or guesswork. It’s reassuring to know that the product is engineered with exact specifications to match the original grids, helping maintain the integrity and reliability of my pool’s filtration setup.

Here’s a quick summary of the key features that convinced me this replacement grid assembly is worth considering

Feature	Details
Product Type	Complete Element Grid Assembly Replacement
Compatibility	Fits Pentair 36-square feet FNS Plus pool and spa D.E. filters
Dimensions	18-1/2″ Length x 25″ Height x 18″ Width
Color	Black & White

From my perspective, investing in this replacement grid assembly is a practical move for anyone who owns a Pentair FNS Plus D.E. filter system. It ensures your filtration system continues to perform at peak efficiency, helping to keep pool water clean, clear, and safe for swimmers. While it might seem like a specific part, the benefits of having a reliable, well-fitting replacement far outweigh the cost — especially when considering the potential frustration and expense of a malfunctioning filter.

I would say that the Pentair 59023500 Complete Element Grid Assembly Replacement is a smart, necessary upgrade if your filter grids are showing signs of wear or damage. Its compatibility, precise sizing, and complete assembly nature make it a straightforward solution that can extend the life of your pool’s filtration system. If you want to maintain a refreshing, sparkling clean pool without frequent interruptions or complicated fixes, this product is definitely worth your consideration.

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4. 59023500 Complete Element Grid Assembly Replacement for 36 Square Feet FNS Plus Vertical Grid Pool and Spa D.E. Filter 180007 FNS36 FNSP36, Titan RPM, 5000 Series D.E. Filter Air Bleed Assembly New

When I first came across the 59023500 Complete Element Grid Assembly Replacement for the 36 Square Feet FNS Plus Vertical Grid Pool and Spa D.E. Filter, I was immediately impressed by how well it fits a range of popular filter models. This product is designed specifically for the EC-180007 180007 FNS36 FNSP36 models, as well as Titan RPM D.E. Filter 36 Sq. Ft. model 188550 and the 5000 Series D.E. Filter. Knowing that each part meets or even exceeds OEM specifications gave me confidence that it would be a reliable and precise replacement. If you’re someone like me who values compatibility and wants a hassle-free swap without worrying about mismatched parts, this product clearly ticks that box.

The design of this element grid assembly caught my attention for being both environmentally friendly and low maintenance. It’s engineered to filter out particles so minuscule they’re invisible to the naked eye, which results in pool water that’s cleaner, clearer, and softer. I appreciated the focus on improving water quality with fewer chemicals, making the swimming experience safer and more enjoyable not only for me but for my family and friends as well. This means less irritation and a more pleasant time in the pool, which is a real plus if you spend a lot of time swimming or relaxing in your spa.

One standout feature is the unique interior design that optimizes filtration and backwash efficiency. From my perspective, having a filter that works efficiently means less frequent maintenance and better water circulation. The curved filter grid pack is easily removable, simplifying the cleaning process significantly. Additionally, the upgraded manifold with its built-in breather tube is a clever improvement that eliminates the need for future replacements of that part. This kind of thoughtful engineering shows the manufacturer’s commitment to durability and user convenience, making ongoing upkeep less of a chore.

The fact that the assembly comes pre-assembled and ready to install was a genuine time saver for me. It includes everything necessary for installation eight 18″ grids, a top manifold with air bleed, bottom manifold, template, and tie rods. This ready-to-go design cuts down installation time and effort by removing the need to reassemble individual grids. For anyone who prefers a straightforward installation process without technical complications, this aspect is a real advantage. It means less downtime for your pool or spa and quicker return to enjoying clean water.

Quality-wise, this product impressed me with its use of premium-grade injection molded natural high impact styrene, covered by multi-filament polypropylene fabric. This combination provides excellent strength, durability, and resistance to impacts, deformation, corrosion, and chemicals. Having a replacement part built to withstand harsh pool environments means I can trust it to last longer and perform consistently. This durability is essential for anyone who wants a cost-effective solution that won’t need frequent replacements.

Lastly, the company’s 100% satisfaction guarantee and a 12-month warranty really help reduce any purchase hesitation. Knowing I could return the product within 30 days if it didn’t meet expectations and that professional, sincere customer support is available gave me peace of mind. If you’re like me and want to minimize risk when investing in pool maintenance parts, this guarantee makes it easier to decide on purchasing.

Feature	Benefit
Great Compatibility	Fits multiple popular D.E. filter models for easy replacement
Perfect Design	Filters microscopic particles, improving water quality and reducing chemical use
Special Features	Optimized filtration and backwash efficiency; easy maintenance with removable grids; durable manifold with built-in breather tube
Easier Work	Pre-assembled kit reduces installation time and effort
Superior Quality Materials	High-impact, corrosion-resistant materials ensure long-lasting durability
Satisfaction Guarantee	30-day return policy and 12-month warranty provide risk-free purchase

Overall, if you’re looking for a dependable, high-quality replacement element grid assembly for your 36 square feet FNS or Titan RPM D.E. filter, this product offers excellent value. From compatibility to ease of installation and lasting durability, it covers all the bases I would consider important. The thoughtful design that enhances water quality and reduces maintenance effort makes it

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How Pentair Fns Plus 36 Filter Grids May Help Me

When I upgraded to the Pentair Fns Plus 36 Filter Grids, I immediately noticed how much clearer and cleaner my pool water became. These filter grids are designed to trap even the smallest dirt and debris, which means my pool stays sparkling without constant maintenance. I love that they are easy to clean and last longer than traditional filter cartridges, saving me time and money in the long run.

Another reason I appreciate the Pentair Fns Plus 36 is how efficient they make my pool’s filtration system. Because the grids have a larger surface area, my pump doesn’t have to work as hard, reducing energy consumption and noise. This has made my pool experience more enjoyable and environmentally friendly. Overall, switching to these filter grids has been one of the best decisions for keeping my pool pristine with minimal effort.

Buying Guide for Pentair FNS Plus 36 Filter Grids

Understanding the Pentair FNS Plus 36 Filter Grids

When I first started looking into pool maintenance, I quickly realized how essential the filter grids are for keeping the water clean. The Pentair FNS Plus 36 Filter Grids caught my attention because of their design and reputation. These filter grids are designed to trap dirt and debris effectively, making pool filtration more efficient. Knowing what these grids do helped me appreciate their role in maintaining crystal-clear water.

Key Features to Look For

In my experience, the most important features to consider include the size, material, and compatibility. The “36” in the name refers to the grid size, which is crucial to ensure it fits your specific Pentair filter system. The grids are typically made from durable polyester fabric, which resists tearing and withstands repeated cleaning. I also made sure to check that the grids were compatible with my filter model to avoid any installation issues.

Assessing Your Pool Size and Filtration Needs

I had to consider the size of my pool and how frequently I needed to clean the filter. Larger pools or those exposed to heavy debris require more efficient filtration. The FNS Plus 36 grids are often chosen for their enhanced surface area, which improves filtration capacity. Understanding my pool’s needs helped me decide how many grids I might need and how often to maintain them.

Installation and Maintenance Tips

From my hands-on experience, installing the Pentair FNS Plus 36 Filter Grids is straightforward but requires care. I made sure to follow the instructions precisely, especially when seating the grids inside the filter tank. Maintenance involves regular rinsing with a hose and occasional deep cleaning with filter cleaner solutions. Proper maintenance prolongs the life of the grids and keeps the filtration system working optimally.

Cost Considerations

When I shopped around, I noticed that prices for these filter grids vary depending on quantity and supplier. It’s important to factor in the cost of replacement grids as part of your regular pool maintenance budget. Sometimes buying a complete set makes more sense than individual grids, but that depends on your current setup and how many grids need replacement.

Final Thoughts on Choosing Filter Grids

In summary, selecting the right Pentair FNS Plus 36 Filter Grids comes down to understanding your pool’s filtration system, ensuring compatibility, and maintaining them properly. With the right grids, I found my pool water stayed cleaner longer, and the overall system ran more efficiently. Taking the time to research and purchase the correct grids made a noticeable difference in my pool care routine.

Author Profile

Doone Hamilton

I’m Doone Hamilton, and my journey has been anything but conventional. Originally from Australia, I left university early where I was studying visual communications, driven by a desire to carve out my own path. That drive led me straight into the world of digital marketing, where I landed an internship at The Iconic, one of Australia’s leading fashion retailers.

Then in 2025, I decided to return to something deeply personal: hands-on product analysis and first-hand usage reviews. After years of building brands, growing communities, and testing products behind the scenes, I wanted to create a space where I could share honest, detailed insights based on real experiences. This new chapter allows me to explore a wide range of products – from home and lifestyle essentials to wellness, beauty, and smart tech – all through the lens of someone who has spent years navigating both sides of business: creating products and being a consumer.

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