Pentair ST40/50 DE Grid [19-3/4" x 6-1/2"] [4 Required] (191322) marquisspas Helps direct return water flow

Helps direct return water flow in compatible pool applications

Helps restore accessory-level control where added outputs are used

cleaner hydraulic balance

A snap-fit standpipe assembly with lateral helps define the internal water path of the filter while supporting the lower collection area

Improves overall presentation of the spa interface

Pentair ST40/50 DE Grid [19-3/4" x 6-1/2"] [4 Required] (191322) marquisspas Helps direct return water flowThe Pentair 191322 ST40 50 DE grid is designed for compatible ST40 and ST50 DE filter applications and measures approximately 19 3 4 inches by 6 1 2 inches. This grid is one of the required internal filter elements, and four are needed for the complete assembly. A replacement grid is commonly needed when the original is torn, weakened, or no longer worth reinstalling during service. Using the correct Pentair grid can help restore proper internal fit