Heavy Duty Pond Bottom Drain

4" EasyPro Heavy Duty Pond Bottom Drain - EBD4 FREE SHIPPING! The popular EBD Heavy Duty Pond Bottom Drain has been redesigned and is now available with or without an air diffuser.   Threaded center stand pipe securely attaches dome lid to base Welded FPT threaded inlet eliminates the need for rubber coupling Sixteen stainless screws securely attach the liner ring to the base with water tight seal Heavy duty, the roto-molded design offers superior strength For use with 4" schedule 40 PVC fittings and pipe, use a 4" male adapter (MA40) to connect to 4" pipe, use a reducing male adapter (RMA4030) to connect to 3" pipe EBD4A Heavy Duty Bottom Drain  incorporates an air diffuser into the dome lid - incoming air is delivered up through the center stand pipe allowing air tubing to be installed underline The EasyPro Heavy-Duty 4-Inch Pond Bottom Drain is designed to connect the bottom drain to the skimmer box and includes a bottom drain, 3" bulkhead fitting, 3" valve, and fittings (flex pip