The Evolution Aqua 4" Aerated Bottom Drain is made of heavy duty Schedule 80 PVC. It features both a 4" horizontal pipe fitting and a 1" side-mounted aeration pipe fitting to make aeration simpler. The center stand pipe can be adjusted, threading to the underside of the aeration plate and gluing to the bottom of the drain base. Includes stainless steel screws, liner ring and aeration disc with plate. Features: Heavy Duty Schedule 80 PVC 4” Horizontal Pipe Fitting 1” Side Mount Aeration Pipe Fitting (easier application than bottom pipe fitting bottom drains) Center standpipe can be adjusted, threads to the underside of aeration plate and glue to the bottom of the drain base Includes 4” bottom drain base with 1” air inlet, stainless steel screws, liner ring, and aeration disc with a plate. View Evolution Aqua 4" Bottom Drain with Air Diffuser Instructions (PDF) Not sure which bottom drain is right for your pond? Read Play It Koi's Complete Bottom Drain Buyer's Guide for sizing help, brand comparisons, and installation tips.
