Click to expand Tap to zoom 1.5" Retro-fit Bottom Drain by Elite Koi Save £-99.95 £99.95 | / 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart 1.5" Retro-fit Bottom Drain (Weighted with 1.5" Pickup) Can be used pump fed or gravity fed.