Pentair - EC-188594 Quad DE 100 sq. ft. Cartridge Style DE Pool Filter - Limited Warranty

Pentair  EC-188594 Quad DE 100 sq ft Cartridge Style DE Pool Filter  Limited Warranty

Pentair - EC-188594 Quad DE 100 sq. ft. Cartridge Style DE Pool Filter - Limited Warranty

Item No. 387220
Manufacturer SKU: EC-188594
4.1 out of 5 Customer Rating
The Pentair Quad DE In-Ground Pool D.E. Filter contains 4 cartridge style DE filter elements instead of the standard curved DE grids. More Details

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The Pentair Quad DE In-Ground Pool D.E. Filter contains 4 cartridge style DE filter elements instead of the standard curved DE grids.
  • Valve sold seperately
  • Compatible with valves: 261173 (1.5' MPV), 263079 (2" PVC Slide Valve), 261049 (2" HiFlow Valve no plumbing), 261050 (2" HiFlow w/plumbing), 261055 (2" MPV), 263064 (Push Pull Valve, 7.5" Center)
  • Four large-capacity cartridges provide maximum filter surface area for greater dirt-trapping capacity and longer periods between cleanings
  • Unique internal flow path ensures optimum filtration and backwashing efficiency
  • Chemical resistant, fiberglass reinforced polypropylene tank for exceptional strength and long life
  • Easily removable cartridge elements make maintenance fast and easy
  • Water flows through the Quad D.E. Filters so efficiently that your pump will use less energy
  • Manual air relief valve and continuous internal air relief work together to maintain efficient filtration
  • Durable 8 oz. polyester cartridge media has super-slick surfaces, making them easier to clean than conventional cartridge filters
  • Attractive almond-colored tank blends into any backyard environment


The Pentair Quad DE 100 sq ft In-Ground Pool Filter 18594 provides the highest level of filtration out of all the filtration types available. The Quad DE 100 sq ft is capable of filtering out particulate as small as 5 microns. That's the same size as a human red blood cell. The Quad DE 100 uses a set of 4 cartridges coated in pool grade diatomaceous earth to provide filtration.The cartridge dimensions are 32.75" x 6.25" x 6.25" with a 3" center hole. The Quad DE 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 through 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 Quad DE lid it requires a minimum of 74" 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: 80 lbs
How much DE do I add?
  • The 1888594 Quad DE 100 sq ft uses 10 lbs of DE.
What is the max GPM flow rate?
  • The max GPM flow rate is 160 GPM.
What does Quad DE 100 sq ft come with?
  • The Quad DE 100 sq ft comes with the tank, steel clamp, air relief valve, and threaded bulkheads.

California Residents WARNING: Cancer and Reproductive Harm -


Energy Efficient
D.E. Filter systems cut energy costs by using lower pump pressure and speeds. If properly taken care of and rinsed regularly, they can significantly reduce water use. In addition to cost savings, lower pump pressure can help prolong the life of your pool pump!
Diatomaceous Earth (D.E.)
D.E. is a natural substance that captures dust, dirt and debris as small as 5 microns. A D.E. filter system removes body oils, suntan lotions, pollens, dust, and even some bacteria, making your swimming pool a healthier environment.
Low Maintenance
A D.E. Filter maximizes the useful filtration area. A larger filtration area means longer periods between each cleaning, saving you time on pool maintenance and giving you more time to relax and enjoy your pool.


Pool Type: In Ground
Installation Type: Residential
Filtration Area: 100 sq ft
Product Type: Pool Filter
Filter Type: Diatomaceous Earth
Eco-Friendly: Yes
Manufacturer: Pentair
Warranty: 1-Year


One (1) Year Limited Warranty on Product, see Owner's Manual for a full description of warranty claims and coverage details.

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