sand filter backwash

Most sand filters list multi-port valve positions such as Filter, Rinse, Recirculate, Winter, Backwash, and Waste. Some larger models also include a Closed position.

Product details typically state that filter sand lasts about five years before replacement, though actual life depends on water chemistry and how frequently the filter is properly backwashed.

Filter tanks are commonly molded and double-reinforced plastic or made from HDPE or other corrosion-resistant polymers—materials presented as durable choices for repeated backwashing.

Available sand capacities noted across models include about 100 lb, 175 lb, 250 lb, and 300 lb.

Backwash and Rinse typically appear as labeled positions on the multi-port valve or control dial. Product descriptions commonly list settings such as Filter, Rinse, Backwash, Waste, Winter, Recirculate, and on some models a Closed mode.

Many combos include drain hardware to aid backwashing and winterizing, commonly a drain spigot, drain cap or drain kit, and a drain plug. Some listings also note threaded joints to assist draining.

Flow specs vary by model. Examples include a smaller 0.33 HP pump rated at 1,585 GPH and larger filter models that quote flow capacities of 55 GPM and 65 GPM.

Systems use either 6-way or 7-way multi-port valves, so you’ll find both 6-function and 7-function valve options across models.

Combo descriptions commonly list a multi-port valve plus monitoring/control accessories such as a pressure gauge and, on some pump bundles, a built-in timer. Package lists also mention power cords/plugs and other pump components.

Descriptions show models sized for pools of roughly 15,600 gallons on smaller tanks, about 19,000 gallons for mid-size tanks, and up to around 21,000 gallons for larger tanks.