Retrofit Bottom Drain 3" w/Air Diffuser

This is exactly what I needed. The air diffuser works as intended. Just don't forget to follow instructions and fill it with gravel so it stays anchored down.

How about u fill it with sand like stated in the description?

Worst customer service ever. Do your research before buying this trash

I have researched every way I can think of and can't find any information on how to weigh it down. Even with heavy pipe it floats to the top. Big problem!