Well Seals – Sizing, Materials, and Buying Guide

A well seal creates a sanitary barrier at the top of your well casing, supporting the drop pipe and wiring while helping prevent contamination. Choosing the right seal means matching your casing size (OD), drop pipe bore, and the number of pass-throughs you need. Materials vary: ABS is lightweight and corrosion-resistant, while cast iron offers added strength for demanding installs. Whether you’re replacing a worn seal or installing a new pump system, Aqua Science carries a full range of well seals to fit your setup. Learn more in our full guide.