Pentair DE Grid replacement for Sta-Rite System 3 SMD Series — 60 sq ft direct-fit, OEM dimensions

Pentair's DE Grid for the System 3 SMD Series is a direct-fit 60 sq ft diatomaceous earth filtration element designed to restore peak filtration performance in compatible Pentair Sta-Rite pool and spa filters.

If your Sta-Rite System 3 SMD-Series filter is showing higher pressure, reduced flow, or more frequent backwashing, replacing the D.E. grids with a correctly sized element brings the filter back to intended efficiency. This replacement grid provides the same 60-square-foot filtration area specified for certain System 3 models and matches the original equipment dimensions so installation is straightforward for most DIYers and service technicians.

How does this Pentair DE grid fit my System 3 SMD-Series filter?

This grid is made to the original Sta-Rite System 3 SMD-Series physical specifications so it aligns with the manifold and tank geometry used in those models. Confirm compatibility by checking the SMD-Series model number and interior manifold type before ordering.

• Exact 60 sq ft filtration area for specified System 3 models
• Dimensions: 17" length × 27.5" height × 17" width to match original grids
• Engineered to seat into the SMD-Series manifold and clamp system
• Works with standard D.E. charging procedures used for System 3 filters

What performance improvements should I expect after installing this element?

Replacing worn or damaged grids typically lowers operating pressure and improves water clarity because the fresh D.E. surface traps finer particles more effectively. You should notice stronger circulation and longer intervals between backwashes when the grid is properly installed and charged with D.E.

• Restores original filter flow characteristics and pressure profile
• Improves particle capture down to fine micron ranges with proper D.E.
• Reduces frequency of deep cleaning and maintenance cycles
• Helps maintain consistent water clarity during heavy pool use

How do I install and maintain the System 3 60 sq ft grid?

Installation requires basic pool service tools and safe handling of used D.E. material. Always follow Pentair/Sta-Rite installation steps: shut off pump, open the filter, remove old grids, inspect manifold seals, install the new grid, and reassemble. Charge the element with the recommended type and amount of D.E. before restarting circulation.

• Turn off pump, drain or depressurize filter before opening
• Inspect manifold, clamp, and O-rings; replace if worn
• Rinse new grid with low-pressure water before charging
• Add the correct quantity of D.E. during the filter’s backwash/rinse cycle

Why choose an OEM Pentair replacement grid instead of generic parts?

OEM Pentair grids are engineered to match original tolerances, manifold connections, and material specifications for System 3 filters, reducing fitment issues and sealing leaks. Using the correct replacement grid helps maintain warranty alignment and predictable performance over time.

• Made to original Sta-Rite System 3 SMD-Series specifications
• Reduces risk of misfit, bypass, or premature wear found with non‑OEM parts
• Simplifies maintenance with assured dimensional accuracy
• Supports long-term filtration performance and system reliability

Who is this for: Pool owners, maintenance professionals, and service technicians responsible for Pentair/Sta-Rite System 3 SMD-Series pools and spas who need a reliable, correct-size 60 sq ft D.E. replacement element. If your filter is one of the SMD-Series models that specifies a 60-square-foot grid and you want to restore original filtration efficiency without retrofit modifications, this Pentair element is the appropriate OEM choice.