square main drain

The Square Main Drain is an essential pool plumbing component designed to efficiently pull water from the deepest point of a swimming pool or spa for filtration, heating, and chemical treatment. Its square shape offers a modern, streamlined look and often provides a larger surface area for water intake compared to round models—making it especially effective in larger or high-traffic pools.

Constructed from high-quality, chemical-resistant materials such as UV-stabilized ABS, PVC, or stainless steel, the square main drain is built for long-lasting durability in harsh pool environments.

It typically features a slotted or perforated grate cover that allows optimal water flow while helping to prevent the entry of debris and minimizing the risk of swimmer entrapment.

Designed to meet international safety standards—including compliance with the VGB (Virginia Graeme Baker) Pool & Spa Safety Act—the square main drain is engineered with anti-vortex features and low suction velocity to enhance swimmer safety. It is suitable for use in all pool types, including concrete, vinyl, and fiberglass installations.

The square main drain is easy to install, maintain, and clean, and it plays a vital role in promoting balanced water circulation, preventing dead zones, and supporting efficient pool filtration. Its sleek appearance, high performance, and enhanced safety make it an ideal choice for both residential and commercial pool systems.