So I am redoing the plumbing of my water pond. The suction side is a 1.5" pipe going to an above ground pump.

I need a way to allow all the water to be removed in the future for a complete cleanout, but I also need a way to do the normal circulation of the water to the pump then back to the pond via a return line going to a water feature like a fountain or a waterfall. I want to place the regular suction "inlet" via a strainer body I made out of a 4" PVC pipe with hundreds of drilled holes, this is positioned in the middle of the pond depth where water is usually clear and free of debris. I then need an inlet as close to the bottom of the pond as possible for the clean out, but this is usually tricky because the bottom is typically full of leaves, seeds, broken down algae and fish waste that could easily clog them. So I kind of worked up a contraption and would like your opinion.

This is a picture of the pieces I found. One of them is the 4" strainer body that's 36" long before I reduce it to 2" then 1.5". The other is a floor drain I found at the box stores, and a three way valve.



This is how I put them together in a step back view.



The three way valve will be submerged, normally allowing flow from the long strainer body, but if I need to go lower, I will turn the lever to switch flow from the upside down floor drain.





Do you think this will work?

My wife says the floor drain looks like a toilet plunger and too ugly hahaha.

Looks like it will work...I would space the upside down floor drain about 1/4" off the concrete to ensure adequate flow into it.