Product Overview

The Pentair FNS Plus 36 sq ft DE Filter | EC-180007 is a high-performance diatomaceous earth pool filter designed to deliver exceptionally clear water for residential inground pool systems. With 36 square feet of effective filtration area and a rated flow of 72 GPM, this filter provides strong dirt-holding capacity and fine-particle filtration.

The FNS Plus series uses curved vertical grids to maximize filter surface area and improve filtration efficiency. Its internal design is engineered to reduce flow restriction, helping the filter achieve strong performance with less pumping effort. Pentair lists the FNS Plus series as fiberglass-reinforced polypropylene filters with a maximum continual operating pressure of 50 PSI, and flow rate is based on 2 GPM per square foot of filter area.

Built with a durable fiberglass-reinforced polypropylene tank, a Service-Ease™ grid pack, and integrated air-relief features, the EC-180007 is a strong choice for pool owners who want premium DE filtration and professional-grade durability.

Ideal For

• Residential inground swimming pools
• Pool owners wanting superior water clarity
• Replacing older DE filters
• Upgrading from sand filtration
• Pool systems requiring 72 GPM filter flow
• Pools with fine dust, pollen, and small debris
• Equipment pad upgrades
• Professional pool equipment installations
• Customers who prefer DE filtration performance
• Systems using backwash valves or separation tanks

Key Features

• 36 sq ft DE filtration area — provides fine-particle filtration for clear, polished pool water.
• 72 GPM flow rate — supports efficient circulation for properly sized pool systems.
• Vertical curved grid design — maximizes filter surface area and helps improve filter performance.
• Fiberglass-reinforced polypropylene tank — strong, chemical-resistant construction for long service life.
• Service-Ease™ grid pack — designed for convenient one-at-a-time grid servicing.
• Top manifold design — supports efficient DE filtration and easier maintenance access.
• Reduced internal flow restriction — helps maintain efficient hydraulic performance.
• High Flow manual air relief valve — helps release trapped air during startup and operation.
• Continuous internal air relief — helps reduce air buildup inside the tank during circulation.
• Tension control clamp — provides secure tank closure and easier service access.
• 1.5" drain reference — conveniently located drain supports filter maintenance.
• Compatible with all common pool sanitizers — suitable for properly maintained chlorine, bromine, and saltwater systems.

Benefits

The Pentair FNS Plus EC-180007 helps produce sparkling pool water by using DE filtration, one of the finest common pool filtration methods. DE media can capture very small particles, helping remove dust, pollen, and fine debris that may pass through many standard sand filters.

The 36 sq ft grid pack provides a strong balance of flow and filtration area for many residential pool systems. Its curved grid design helps maximize usable filter surface area, while the fiberglass-reinforced tank offers long-term strength in outdoor pool environments.

For pool professionals, the Service-Ease grid pack and secure clamp design make routine cleaning and grid service more manageable. For pool owners, the result is dependable filtration, clear water, and a durable filter platform from Pentair.

Specifications

Included Components

• 1 × Pentair FNS Plus 36 sq ft DE filter tank assembly
• 1 × internal vertical grid pack
• 1 × top manifold assembly
• 1 × High Flow manual air relief valve
• 1 × tank clamp assembly
• Internal air relief components
• Drain assembly
• Manufacturer-supplied installation documentation

Backwash valve, multiport valve, slide valve, DE powder, plumbing valves, unions, additional fittings, separation tank, pressure gauge parts, replacement grids, O-rings, and installation labor are sold separately unless specifically included by the supplier.

Compatibility Notes

The Pentair EC-180007 is designed for residential inground pool systems requiring a 36 sq ft DE filter with a 72 GPM flow rating.

Common compatibility and application references include:

• Pentair FNS Plus FNSP36
• Pentair part number 180007
• Systems requiring DE filtration
• Pool systems using compatible Pentair backwash valves
• Pool systems requiring up to 72 GPM filter flow
• Residential inground pool filtration upgrades

Compatible valve options may include Pentair slide or multiport valves depending on plumbing layout and installation requirements. Always confirm valve size, valve type, plumbing size, equipment pad layout, and local code requirements before ordering.

Installation Notes

This filter should be installed by a qualified pool professional. Proper installation requires correct plumbing alignment, compatible valve selection, pressure testing, DE charging, flow verification, and safe startup.

Before installation, confirm that the connected pump does not exceed the filter’s 72 GPM flow rating or 50 PSI maximum operating pressure. The filter must be installed on a level, stable equipment pad with enough clearance for clamp removal, grid service, and tank access.

Always turn off the pump and relieve all system pressure before opening the filter. Never loosen or remove the clamp while the filter is pressurized.

Customer-Facing Q&A

Q: What is the Pentair EC-180007?
A: It is a Pentair FNS Plus 36 sq ft vertical-grid DE pool filter, also commonly referenced as model FNSP36.

Q: What is the SKU?
A: The SKU is EC-180007.

Q: What is the UPC / GTIN?
A: The UPC / GTIN is 788379500498.

Q: What is the related Pentair part number?
A: The related part number is 180007.

Q: What is the filtration area?
A: This filter provides 36 sq ft of effective DE filtration area.

Q: What is the flow rate?
A: The rated flow is 72 GPM.

Q: What is the 8-hour turnover capacity?
A: At 72 GPM, the 8-hour turnover capacity is approximately 34,560 gallons.

Q: Does this filter include the valve?
A: No. The backwash valve, multiport valve, or slide valve is sold separately.

Q: Does this filter include DE powder?
A: No. DE powder is sold separately and must be added during startup according to the filter instructions.

Q: What material is the tank made from?
A: The tank is made from fiberglass-reinforced polypropylene.

Q: What is the maximum operating pressure?
A: The maximum continual operating pressure is 50 PSI.

Q: Is this for inground pools?
A: Yes. This filter is commonly used for residential inground pool systems.

Q: Should this be professionally installed?
A: Yes. Professional installation is recommended to ensure proper valve selection, plumbing, pressure safety, DE charging, and system setup.