These bottom drains are great for reducing the build-up of sludge in your pond. Use with a gravity-fed filter and install in the deepest part of your pond with the area around them 'dished' to draw water and solids to your filter.
Best fitted during construction and suitable for concrete/fibreglass or a liner.
Available in two sizes: Small - 4" x 2" (fits 2" Pipe) Large - 9" x 4" (fits 4" Pipe)
