59023700 Pool Filter Top Manifold Fit FNS Plus 24 36 48 60 Pentair Pool Filter

Pool Filter Top Manifold for Pentair

This pool filter top manifold directs water flow inside Pentair FNS Plus diatomaceous earth (DE) pool filters and replaces OEM part number 59023700.

Overview

The pool filter top manifold sits at the top of the DE grid assembly in Pentair FNS Plus filters, channeling filtered water back to the pool. It is built for direct replacement of cracked or leaking manifolds in residential and commercial pool equipment, ensuring even water distribution across all grids. Pool service technicians and DIY owners rely on this pool filter top manifold to restore filtration performance on FNS Plus 24, 36, 48, and 60 models.

Built For Performance

• Molded from durable, chemical-resistant thermoplastic to withstand constant exposure to chlorinated water and high flow rates
• Precision-engineered port alignment ensures a snug fit over the standpipe and grid outlets
• Reinforced webbing around the central hub resists cracking under pressure spikes
• Smooth internal passages reduce turbulence and maintain optimal flow velocity
• Direct OEM-style replacement matches the factory 59023700 manifold footprint
• UV-stabilized material helps prevent embrittlement from sun exposure when the filter lid is open during service

Fits These Machines

• for Pentair FNS Plus 24
• for Pentair FNS Plus 36
• for Pentair FNS Plus 48
• for Pentair FNS Plus 60

On-The-Job Use

• Full rebuild of a DE grid assembly after a manifold crack causes DE powder loss
• Routine pool filter maintenance when swapping out damaged or worn top manifolds
• Retrofit on aging Pentair FNS Plus filters to restore like-new water clarity
• Commercial pool service trucks kept on hand for emergency filter repairs
• Seasonal pool opening where a winter-cracked manifold needs immediate replacement

Specs At A Glance

Good To Know

Q: How do I know if this top manifold fits my Pentair filter? A: Check the label on your filter tank; it is designed for Pentair FNS Plus 24, 36, 48, and 60 DE filters. Compare your old manifold's part number to 59023700 to confirm a match.

Q: What symptoms indicate a faulty top manifold? A: A cracked or warped manifold often causes DE powder to blow back into the pool, uneven pressure, or water bypassing the grids. Replacement restores proper filtration and chemical balance.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.