20" x 4.5" Refillable Water Filter Cartridge Choose::Clear Cartridge w/ Coconut Shell GAC Pillow Packs The HF4-4040 RO membrane elements

The HF4-4040 RO membrane elements are available in all standard commercial sizes

Greenhouses

NOTE: Pump must be placed in area that will not freeze

SHE-10 and SH-20 systems

20" x 4.5" Refillable Water Filter Cartridge Choose::Clear Cartridge w/ Coconut Shell GAC Pillow Packs The HF4-4040 RO membrane elementsThe 20" x 4. 5" Empty Refillable Filter Cartridge REC 4520W is an environmentally friendly alternative to water filtration that is reusable. Recycle, Refill, Reuse. Stop throwing away plastic and filling up landfills. The REC 4520W can be filled with a variety of medias: calcite for pH adjustment, activated carbon for taste and odor improvement, softening or mixed bed ion exchange resins, and other medias. When the media is exhausted, simply discard