Check the listing for details. Easy Pro EBD4A 4" Heavy Duty Bottom Drain with Air Diffuser - Best Pond Cleaner. Color: Black, Condition: New. Listed at 215.99 USD. Easy Pro EBD4A 4" Heavy Duty Bottom Drain with Air Diffuser - Best Pond Cleaner PRODUCT DESCRIPTION:Easy Pro EBD4A 4" Heavy Duty Bottom drain with air diffuser Many pond builders have found that adding a bottom drain helps keep a pond cleaner. Fish waste and other muck that accumulates on a pond bottom can be easily removed by a bottom drain. Ponds that are over 2′ deep can become stagnant without a bottom drain 4″ EBD4A Bottom Drain Features:Heavy duty, roto-molded design offers superior strength Welded FPT threaded inlet eliminates the need for rubber coupling Threaded center stand pipe securely attaches dome lid to baseSixteen stainless screws securely attach liner ring to base with water tight seal For use with 4″ schedule 40 PVC fittings and pipe, use 4″ male adapter (MA40) to connect to 4″ pipe, use reducing male adapter (RMA4030) to connect to 3″ pipe EBD4A incorporates an air diffuser into the dome lid – incoming air is delivered up through the center stand pipe allowing air tubing to be installed under liner EBD4A tubing adapter is 1/2″, recommended air flow through diffuser is .5 – 1.5 cfmITEMS INCLUDE: ♦ EasyPro EBD4A bottom drain (Base, ring and lid) ♦ 3 /4" x 21 /2" long check valve (blue) ♦ 16 stainless steel screws (12 x 1" phillips pan head) ♦ Membrane air diffuser (MD3) ♦ 8" PVC stand pipe ( 3 /4" mpt) ♦ 3 /4" mpt x 1 /2" barbed elbow (for airline). Why Buy from Us?We will provide you excellent experience an outstanding price, service and ethics. That’s why, you can be assured that you will have a great after sales service, and have the peace of mind and to satisfy our highly respected customers to buy with 100% satisfaction. Want to know more?Have you got any questions about our products? Please feel free to ask by leaving a message through the ebay messaging service and our customer service will get back to you with high priority. We are here for you, we are here for everybody!