AquaDyne Heavy Duty RHINO Retro Bottom Drains with Air Diffuser Size:Replacement Air Disc for 3" Retrofit Bottom Drain while the other systems are

while the other systems are set up for 3/8" airline

Place application mesh bag in an area where there is water movement

These replacement parts and accessories are for the Aqua Ultraviolet® Ultima II Filters

and outer diameter buttress threads for union adaptors

and fittings

AquaDyne Heavy Duty RHINO Retro Bottom Drains with Air Diffuser Size:Replacement Air Disc for 3" Retrofit Bottom Drain while the other systems areAquaDyne Retrofit Bottom Drains with Air Diffuser offer a quality innovation for a stable and rugged over the liner bottom drain for those who do not want to install a drain through a liner or for pre constructed ponds that do not have a bottom drain. This drain is especially useful for pond and aquatic environments that have preexisting liner, concrete, or any other situation that would not allow underground plumbing to be installed. Keeping solid