4 inch outlet Sump Bottom Drain comes with adjustable lid and liner collar. Complete with screws. A bottom drain is used on a pond which has a gravity fed filter system. Water and pond waste leave the pond via the bottom drain, travel along a length of pipe, and into the pond's filter. Bottom drains are located on the pond floor, and should be positioned in the deeper areas of the pond.

• Solid Plastic
• Fits standard 4 inch pipework
• Lid can be adjusted to suit application
• Collar to keep membrane watertight
• Made in UK