I have a 4ft stock tank (something like this: https://www.lowes.com/pd/tarter-71-gallon-galvanized-steel-stock-tank/3159637) and an almost done tiny house.
I'm trying to convert it into a tub with a shower. Knowing nothing about plumbing I purchased this https://www.amazon.com/Oatey-42099-NO-CALK-Stainless-Strainer/dp/B000BO57AS only to realize it comes up very far off the flat floor of the stock tank. I only realized this after I drilled a 2.5 inch hole in the floor. eek!
What kind of drain can I use to get the flattest possible drain? It doesn't have to be totally flat, but close enough. Is there a name for what I need? Everything I've found so far on amazon and lowes seems to be geared for tile or fiberglass installs.