Place the rubber collar over the liner and pipe.
Diy bottom drain for koi pond.
Think of a koi pond as a swimming pool for koi.
This is before you pour the concrete into the base.
Install the bottom drain bulkhead fitting 1 below the pond bottom surface.
Bottom drains you should fit your bottom drains while the pond is under construction.
Fold the liner over the pipe like a paper towel over a drinking glass.
After you ve got your bottom drains in get all the pipework for the bottom drains laid out in position as well cut to shape lay it then pour in the concrete.
4 gravity flow bottom drains should optimally have a max flow rate of approximately 3600 gallons per hour and will service a 10 diameter pond bottom nicely.
Let the concrete dry install liner and then place drain cover on liner over pipe opening.
Bottom drains are considered a necessity in koi ponds or water gardens greater than 1 000 gallons where water quality and clarity are considered important.
Cut a hole in the middle of the pipe the diameter of the pipe 4 pipe.
Place a bead of silicone around the pipe s outer perimeter.
For liner ponds remove dirt around bottom drain pipe 6 deep with at least a 9 radius.