Kockney Koi Bottom Drain 4″ Tommy

The Kockney Koi 4″ Bottom Drain, also commonly referred to as a Tommy bottom drain or mushroom design bottom drain, is a high-performance solution for efficiently removing waste and debris from the base of koi ponds and large garden ponds. Designed to improve pond hygiene and water circulation, this bottom drain plays a critical role in maintaining excellent water quality and reducing manual cleaning.

The distinctive mushroom-style dome helps prevent fish from entering the drain while encouraging smooth, consistent water flow, allowing solid waste to be drawn directly toward the pond’s filtration system. With a 4″ outlet, this bottom drain is ideal for higher flow rates and larger pond installations.

Suitable for use in fibreglass ponds, concrete ponds, and rubber-lined ponds, the Kockney Koi 4″ bottom drain is a trusted choice for both professional pond builders and experienced koi keepers.

Proudly manufactured in the UK for over 35 years, this bottom drain reflects Kockney Koi’s long-standing commitment to quality, reliability, and proven pond engineering.

Key Features:

• 4″ bottom drain for high-flow koi pond systems

• Tommy / mushroom design dome for safe and efficient waste removal

• Reduces build-up of sludge, debris, and fish waste on the pond floor

• Improves circulation and filtration efficiency

• Suitable for koi ponds, large garden ponds, and filtration systems

• Compatible with fibreglass, concrete, and rubber-lined ponds

• Manufactured in the UK with over 35 years of experience

The Kockney Koi 4″ Tommy Bottom Drain is an essential component for serious koi pond installations, delivering long-term performance, cleaner pond bases, and healthier fish.