Pentair 59023300 Grid Assembly | FNS Plus 60

This grid assembly is best for pool owners running a Pentair FNS Plus 60 DE filter who want to restore like-new filtration performance. It’s ideal for residential pools that demand crystal-clear water and fine-particle removal, especially in dusty or high-debris environments. If your filter pressure rises quickly after cleaning or your water never quite clears, a full grid assembly replacement is often the right move.

Compared to replacing individual grids, the Pentair 59023300 assembly offers better long-term reliability and faster installation. Mixing old and new grids can lead to uneven DE loading, which reduces efficiency and shortens cleaning cycles. A complete assembly ensures proper alignment with the manifold and eliminates hidden weak spots that cause internal bypass.

Pro Tip: When installing a new grid assembly, inspect the air relief screen and manifold O-ring—replacing worn seals at the same time helps prevent internal leaks and pressure problems.

In real pool service scenarios, the Pentair FNS Plus 60 Grid Assembly consistently restores strong filtration and stable pressure readings after installation. Pools clear faster, backwashing intervals extend, and overall system strain decreases. It’s a dependable solution that aligns with Pentair’s original engineering standards. For pool owners who want fewer filter issues and clearer water, this assembly delivers proven results. Backed by ShastaPoolSupply.com’s expert support, competitive pricing, and fast shipping, it’s a confident upgrade for your DE filtration system.