---
title: "What Is Main drain? Pool Glossary | Marina Pool Services"
description: "The main drain is the drain at the deepest point of the pool that pulls water down to the pump."
url: https://marinapool.multisites.ai/glossary/main-drain
publisher: Marina Pool Services
phone: +1-817-896-1120
quote: https://marinapool.multisites.ai/contact
---

Equipment

# Main drain

The main drain is the drain at the deepest point of the pool that pulls water down to the pump.

The main drain pulls water from the bottom, which helps move settled dirt and balance circulation with the skimmers. Many newer pools use more than one drain or a design that cannot trap a swimmer.

A broken, loose, or missing cover is a serious hazard because strong suction can hold a swimmer under. Do not swim until a pro replaces it. Federal law sets drain cover standards for public pools, and the same care makes sense at home. Ask your pool pro whether your drain covers are in good shape.

## Related terms

-   [Drain cover](https://marinapool.multisites.ai/glossary/drain-cover)
-   [Suction entrapment](https://marinapool.multisites.ai/glossary/suction-entrapment)
-   [Equalizer line](https://marinapool.multisites.ai/glossary/equalizer-line)

## Sources

1.  [CPSC: Pool and Spa Drain Cover](https://www.cpsc.gov/Business--Manufacturing/Business-Education/Business-Guidance/Pool-and-Spa-Drain-Covers)

## Need a hand with your pool?

Call or text and tell us what your pool needs. Estimates are free for qualifying services, and same-day estimates are possible when the schedule allows.

[Call (817) 896-1120](tel:+1-817-896-1120)[Get a quote](https://marinapool.multisites.ai/contact)

![A pool technician working on an equipment pad](https://marinapool.multisites.ai/_astro/technician-equipment-pad.BW5xZMNY_Zum1K5.webp)