WATER DRAIN PLUG O-RING

The Hayward “Water Drain Plug O‑Ring” is a simple but important maintenance‑part used in pool and spa equipment — usually paired with a threaded drain plug that provides a way to drain water from a pump housing, filter tank, or plumbing line. The O‑ring sits in a groove around the plug; when the plug is threaded into place, the O‑ring is compressed and forms a watertight seal. This seal prevents water from leaking out under pressure and ensures that the drain port stays closed during normal operation. Without a properly functioning O‑ring, the plug may leak or fail to seal, which can lead to water loss, reduced system pressure, or even damage to equipment housing over time.