Reach in to make sure both the liner and sump are both clean and dry with a rag.
Installing pond liner bottom drain.
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Pond bottom drains simply push dirty pond water to the filter and push it back into the pond once it is clean.
Before installing a pond liner pack some dirt into any voids to create a nice smooth backing for the liner.
Another option is to use expanding foam to fill any voids and provide a smooth surface for the liner.
Place liner in pond.
It is very important to make sure you have enough liner around all the sides of your pond before you cut the drain in.
The liner is installed as normal but cut out a hole of the geosynthetic around the drain.
Make sure liner is properly aligned so that the liner extends over all the outer edges of the pond then cut a 2 inch hole in the liner over the bottom drain opening only.
Use a small paint brush to reach through thehole in the liner and brush away any debris that might have collected on top of the bulkhead flange.
Rectangular box welded pond liner insert flexible 168 00.