# Swimables SW-25-400 DE Filter Spreader ### **Key Fit** - **Swimables DE Spreader (SW-26-400)** – OEM-equivalent replacement DE spreader engineered for DE pool filter assemblies - **FNS-Style Filter Compatibility** – Designed to fit **Pentair FNS® and FNS-style DE filters** that use a center-mounted DE spreader - **Correct DE Distribution Design** – Sized and shaped to evenly distribute diatomaceous earth across all filter grids - **Direct Replacement Part** – Installs in place of the original spreader with no modification required during filter service or rebuilds - **Pool-Rated Construction** – Manufactured from durable, chemical-resistant materials for continuous filtration operation - **Service & Rebuild Use** – Commonly replaced during major DE filter rebuilds or when the original spreader is cracked, warped, or damaged ## Restore Proper DE Distribution and Filtration Performance The **Swimables DE Spreader (SW-26-400)** is a replacement internal component designed for **DE (diatomaceous earth) pool filters** that rely on even DE coating across the filter grids. The DE spreader plays a critical role in directing incoming DE slurry evenly throughout the filter tank, ensuring proper filtration, pressure balance, and overall system efficiency. A cracked, warped, or missing DE spreader can lead to uneven grid coating, short filter cycles, and poor water clarity. This product is a **pool filter internal replacement part**, engineered specifically for swimming pool filtration systems. * * * ## What a DE Spreader Does Inside a Pool Filter Inside a DE filter, the spreader sits above the grid assembly and helps disperse DE evenly as it enters the tank. When functioning correctly, it: - Distributes DE evenly across all grids - Prevents channeling or clumping - Supports consistent filtration pressure - Helps maintain clear, polished water When the spreader fails, DE may settle unevenly, causing premature pressure rise and reduced filtration effectiveness. * * * ## Designed for FNS-Style DE Filter Systems The **SW-26-400 DE spreader** is built in a **Pentair FNS-style configuration**, making it compatible with many common DE filter systems that use a center-mounted grid assembly. This part is commonly serviced alongside components found in the **DE Pool Filters Collection** and **Pool Filter Replacement Parts Collection**. Always confirm your filter model and internal layout before ordering. * * * ## Common Symptoms of a Failed DE Spreader A worn or damaged DE spreader can cause noticeable performance issues, including: - Uneven DE coating on grids - Rapid pressure increase after recharging DE - Reduced water clarity - Shortened filter run cycles - DE bypass or internal buildup Replacing the spreader is often necessary when rebuilding or servicing older DE filters. * * * ## Built for Harsh Pool Environments The Swimables DE spreader is manufactured from **pool-rated materials** designed to withstand: - Constant water flow and pressure - Chlorinated and saltwater pools - Seasonal temperature fluctuations - Repeated filter tear-downs This ensures long-term reliability inside the filter tank. * * * ## Ideal for Filter Rebuilds and Seasonal Service DE spreaders are commonly replaced during: - Full DE filter rebuilds - Grid replacement jobs - Annual filter maintenance - Pressure troubleshooting service calls Service professionals often replace the spreader preventatively when grids or manifolds are already removed. This part pairs naturally with **DE filter manifolds**, **grid assemblies**, and **air relief components** found in the **Pool Equipment Parts Collection**. * * * ## Helps Protect Filter Grids and Extend Filter Life Uneven DE distribution places uneven load on filter grids, which can lead to: - Premature grid wear - Torn fabric - Internal cracking - Reduced filtration lifespan Installing a properly functioning DE spreader helps protect the entire grid assembly and maintain consistent performance. * * * ## Installation Notes General service considerations include: - Remove grid assembly before installation - Inspect for cracks or warping before reuse - Ensure correct seating over the standpipe - Reassemble filter carefully before recharging DE Professional installation is recommended during full filter service. * * * ## Specs & Details Specification Details Product Type DE filter spreader Brand Swimables Part Number SW-26-400 Application DE pool filters Filter Style FNS-style DE filters Function Even DE distribution Pool Type In-ground swimming pools Water Type Chlorine & saltwater compatible Material Pool-rated engineered polymer * * * ## Compatible with Professional Pool Maintenance The Swimables DE spreader is commonly installed alongside other internal components such as **DE filter manifolds**, **air bleeder assemblies**, and **grid sets** found in the **Pool & Spa Filters Collection**. Replacing internal components together often restores like-new filtration performance. * * * ## Buy with Confidence from Benchmark Pool Supply At Benchmark Pool Supply, we stock **trusted DE filter replacement parts** used by service professionals and experienced pool owners. The **Swimables SW-26-400 DE spreader** is a reliable solution for restoring proper DE distribution and filtration efficiency. When you buy from Benchmark Pool Supply, you get: - Pool-specific expertise - Proven aftermarket replacement parts - Local inventory and fast availability - Confidence buying from pool professionals We help keep your filtration system performing at its best. * * * ## Details - **Price:** 79.0 USD - **Vendor:** Swimables - **Type:** Pool Filters - **Tags:** Ready for Links ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 79.00 USD | In stock | ## Images - Swimables SW-25-400 DE Filter Spreader genuine OEM pool part for filter assembly repair --- > Source: [Benchmark Pool Supply](https://benchmarkpoolsupply.com/products/swimables-de-spreader-sw-26-400) > Updated: 2026-07-11