Skip to product information
Usually ships in 2–4 business days.
59023700 Pool Filter Top Manifold For Pentair FNS Plus 24 36 48 60
$102.29
Sale price
$102.29
Regular price
Available to Order
This Pool Filter Top Manifold is a direct replacement top manifold compatible with Pentair FNS Plus 24, 36, 48, and 60 pool filters and matches OEM Part# 59023700.
Need help finding the right part? Talk with a parts expert today.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I needed a forklift part and wasn’t sure which one fit. They asked for the model and serial number, got back to me quickly, and made sure I ordered the right one. Really helpful.
Randy W. — Verified customer
Product Overview
This pool filter top manifold is a direct replacement for the upper manifold assembly in Pentair FNS Plus diatomaceous earth (DE) pool filters. The top manifold directs water flow through the filter grids, ensuring optimal filtration and backwashing performance. Installing this pool filter top manifold eliminates leaks caused by cracks or warping in the original manifold, restoring proper water distribution for pool owners and service technicians.
Key Features & Performance
- Molded from high-strength, chemical-resistant material to withstand continuous water pressure and pool chemicals
- Precision-engineered ports align with all filter grids for an exact fit on FNS Plus models
- Direct replacement for Pentair part number 59023700 – no modifications required
- Maintains efficient DE filter performance and proper backwash cycle operation
- Simple drop-in installation reduces pump downtime
- Prevents debris bypass that can damage pump impellers and reduce water clarity
Fitment & Compatibility
- Pentair FNS Plus 24 sq. ft.
- Pentair FNS Plus 36 sq. ft.
- Pentair FNS Plus 48 sq. ft.
- Pentair FNS Plus 60 sq. ft.
Common Uses
- Replacing a cracked or broken top manifold on a leaking FNS Plus filter
- Servicing DE filter grids during a full filter rebuild
- Replacing aging filter components to restore factory flow rates
- Emergency pool pump repair to address pressure loss and poor filtration
- Preventative maintenance for commercial or residential pool systems
Technical Specifications
- Part Number(s): 59023700
- Compatible Filter Models: Pentair FNS Plus 24, 36, 48, 60
- Type: Top Manifold
Frequently Asked Questions
Q: Is this manifold compatible with the Triton or Clean & Clear filter series? A: No, this top manifold is designed specifically for Pentair FNS Plus DE filters and is not compatible with sand or cartridge filter models.
Q: Does this manifold include the internal air relief screen or o-rings? A: The manifold is sold as a standalone replacement part; any required o-rings or the air relief strainer must be purchased separately if not reused from the original assembly.
Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.