Swimquip Filter Grid Element Center Port - 18 x 20-3/4 Inches state_Maryland While the old-style ratchet system

While the old-style ratchet system is cumbersome and bulky

The Pentair Large PVC Light Niche for Concrete Pools has a one inch hub and includes both 45 degree and 3/4 inch reducer bushings

The replacement pump head includes tube

Hammerhead's patented head design and pressurized 30 pound thrust motor pump is an amazing 16

The covers are designed to last for years through all types of weather (snow

Swimquip Filter Grid Element Center Port - 18 x 20-3/4 Inches state_Maryland While the old-style ratchet systemThis is a Swimquip compatible filter element grid with center port measuring 18 x 20 3 4 inches. The thickness of the grid is . 875 inches. Universal Filter Grids for Diatomaceous Earth filters feature a reinforced center core for added durability and chemical resistance, and sonic welded seams to prevent fraying. Their proprietary D. E. grid cloth outlasts all others. They have superior strength fabric and heavy nylon stiches. TIP: Place filter