Bottom Drains

Koi Pond Bottom Drains for Clean Pond Floors

Bottom drains are the foundation of professional koi pond plumbing. Installed at the deepest point during construction, a bottom drain continuously pulls debris and waste off the pond floor and into the filtration system — eliminating the dead zones where sludge accumulates. Play It Koi carries gravity-fed bottom drains, retro-fit drains, and aerated bottom drains from leading manufacturers.

Installation Considerations

For ponds under 3,000 gallons, a single 4-inch bottom drain is typically sufficient. Larger ponds may need two drains plumbed into a common manifold. The pond floor should slope gently toward the drain (minimum 10-degree pitch) to ensure debris migrates naturally. Pro tip: pair your bottom drain with a winter aeration system — an air-diffuser ring around the drain keeps circulation active even when the pump is off.

Play It Koi offers free shipping on orders over $99. Questions? Contact our pond experts for drain sizing guidance.

Related Categories

Pond Plumbing · Pond Filtration · Pond Aeration · Pond Pumps · Pond Liners