Plumbing & Fittings
Rhino Retro Bottom Drain With Air Diffuser
$367.99
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Product details
Product details
Rhino Retro Bottom Drain With Air Diffuser is a retrofit-style bottom drain system designed to help improve circulation and oxygenation in ponds while also sweeping sediment from the bottom. It uses an air diffuser that releases large numbers of air bubbles per second, which encourages gentle water movement and helps keep the pond bottom cleaner. This drain is intended for pond setups where you may not be able to run underground plumbing through a liner or where the pond is already constructed (such as with liner, concrete, or other conditions).
Features:
- Adds air-driven circulation to the pond to increase oxygenation, especially in hot weather
- Creates a sediment-sweeping action as rising bubbles help lift loosened debris
- Designed as a retrofit option for pre-existing liner, concrete, or other situations where underground plumbing isn’t feasible
- Uses heavy-duty PVC materials and is designed not to damage pond liners like sharp-edged products
- Ballast chamber is filled with small stone, sand, or other heavy inert material for stability
- Connects via the drain’s side port to a suction hose or rigid plumbing leading to the pump suction line
- Placement in the center or deepest part of the pond helps the pump draw up suspended solids and debris from the bottom
- In winter, the drain can be moved to a more shallow area to leave warmer lower water undisturbed
Specifications:
- Available sizes: 2" and 3"
- Construction: Heavy-duty PVC materials
- Air diffuser function: Generates rising air bubbles to increase oxygenation and promote bottom-sweeping circulation
- Ballast fill (recommended): Small stone, sand, or other heavy inert material
- Pump connection: Attach suction hose or rigid plumbing to the side port, then to the pump suction line





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