Pentair FNS Plus 60 sq. ft. DE Pool Filter | EC-180009

The Pentair FNS Plus Fiberglass D.E. Pool Filter provides the highest level of filtration. The FNS Plus is capable of filtering out particulate as small as 5 microns. That's the same size as a human red blood cell.


The FNS plus uses a set or grids coated in pool grade diatomaceous earth. The set of grids consists of 7 full grids 30" in length and 1 partial grid 30" in length. The FNS Plus tank is made with fiberglass-reinforced polypropylene that enhances durability and product life. It uses a hi-flow manual air relief valve that eliminates air buildup in the tank rather than having it force back thru the system.


A 1-1/2" drain is used for quick drainage, and a steel tension control clamp rests securely around the tank, a brass barrel nut securely fastens each half tightly together. To remove the FNS Plus requires a minimum of 86" vertical clearance. Before removing the dome lid, it is suggested to backwash the filter to discharge the contaminated DE powder.

Common Questions:

What are the dimensions of the tank?

• Tank Dimensions: (DxH) 21.5" x 55"
• Weight: 84 lbs.

How much DE do I add?

• The FNS Plus uses 6 lbs of DE.

What is the max GPM flow rate?

• The max GPM flow rate is 150 GPM.

What does FNS Plus come with?

• The FNS Plus comes with the tank, steel clamp, air relief valve, and threaded bulk heads.

Does the FNS Plus come with a backwash valve?

• No. The FNS Plus does not come with a backwash valve. For a multi-port valve option, we suggest item number 261152 for 2" plumbing and 261177 for 1.5" installations. For a side-mount push-pull valve, we suggest item number 263064.

What is the warranty for the FNS Plus?

• One year parts only warranty from the date of purchase. Please see the Pentair Warranty Card for more details.