Pentair Sand Dollar Top Mount Filter SD40 | EC-145320

Pentair Sand Dollar SD40 Top Mount Sand Filter | EC-145320

Compact top-mount sand filter by Pentair, featuring 1.8 sq ft area, 150 lbs sand capacity, ~40 GPM flow — optimized for medium residential pools.

Features

• 1.8 sq ft effective filtration area in a 19″ diameter tank — fits tighter equipment pads.
• 150 lbs of #20 silica sand required — lower media cost and easier handling.
• Rated flow around 40 GPM; turnover of ~19,200 gallons in 8 hours under ideal conditions. 
• One-piece thermoplastic tank delivers corrosion and UV resistance for long service life.
• Top-mounted six-position multiport valve for filter/backwash/rinse/waste/recirculate/closed — simplified operation. 
• A combination of sand and water drainage makes winterizing and servicing faster. 

Description

The Pentair Sand Dollar SD40 Top Mount Sand Filter (SKU EC-145320) offers a durable, high-quality solution for residential pool filtration when footprint or budget is a consideration. With a compact 19″ diameter tank and an effective filtration area of 1.8 sq ft, this model manages efficient turnover while requiring only 150 lbs of sand. Constructed with a one-piece thermoplastic tank for superior chemical and environmental resistance, it encapsulates a specially designed internal lateral system to maintain a flat sand bed and promote consistent flow and clarity. The top-mounted multiport valve centralizes operation and simplifies switching between key modes, while the combined drain further eases maintenance. Choose the SD40 when you need reliable performance in a smaller form factor without compromising on longevity.

Pro Tip

Keep your pump’s flow rate under the ~40 GPM design rating to extend media life and backwash intervals. Confirm you have around 37″ of clearance above the filter for the valve and servicing. Load exactly 150 lbs of #20 silica sand for optimal performance and follow Pentair’s instructions for backwashing and winterizing.

Installation Tips

High-level safety/compatibility notes only: Before installing, shut off the filtration system power. Ensure the base is level and rated for the filter tank plus sand weight. Use #20 silica sand and load exactly 150 lbs per the manufacturer's instructions. Verify the multiport valve port size matches your plumbing (typically 1½″), and bond the metal components as required by local code. Do not exceed 50 psi operating pressure and follow Pentair’s manual for winterizing and servicing.