Filbur Pentair/Hayward Diatomaceous Earth [DE] Grid [Partial] [12" x 9-3/4"] [24 SqFt] (FC-9420) tees A union is useful because

A union is useful because it simplifies installation and future maintenance

Useful when original heater and sensor performance decline together

or damaged air bleed assemblies helps restore proper venting

When the internal working side of the generator begins to fade

Filbur Pentair/Hayward Diatomaceous Earth [DE] Grid [Partial] [12" x 9-3/4"] [24 SqFt] (FC-9420) tees A union is useful becauseA partial DE grid helps complete the filtration assembly inside a compatible diatomaceous earth filter, and this Filbur FC 9420 grid is designed for Pentair and Hayward applications in a 12 inch by 9 3 4 inch format for 24 square foot systems. When a partial grid becomes torn or worn, the filter can lose the balanced support it should provide across the internal grid set. The Pentair and Hayward compatibility, partial grid format, and 24 square foot