3" Black Flexible PVC Pipe, 50' roll EasyPro Submersible Pumps (3100-17500 GPH) This is a schedule 40

This is a schedule 40 PVC Cap used to stop flow through PVC pipe

000 gallons initially

Also makes surface easier to clean in the future

The pressure relief valve protects the compressor from excessive  backpressure if there is some sort of blockage in the airline or diffuser

3" Black Flexible PVC Pipe, 50' roll EasyPro Submersible Pumps (3100-17500 GPH) This is a schedule 40This industrial strength flexible PVC pipe is ideal for pond plumbing. It eliminates many fittings and increases water flow because of the lack of elbows. It is black in color, will not crack in freezing conditions, is flexible from 10F to 130F and can be used with standard PVC fittings. Because of the size of this product it can only ship via Motor Freight.