I have a pond setup where there are two pools, a lower pool and upper pool. Water is pumped from the lower pool into the upper pool, with an electric pump, then flows back through a waterfall.
Much of the pump is plumbed with 2" schedule 40 PVC pipe.
In certain situations, such as during storms, or extreme winds, I'd like to be able to stop the pump from sending water to the waterfall. There may also be situations where I need to be able to quickly lower the water level (e.g. before an impending monsoon), so I'm setting up pipes to divert the water elsewhere.
I hope to be able to achieve that with some kind of switch, much like a switch you see on a railroad crossing. Switch is pointed one way, the water goes that way.
I went to the local hardware store and asked if there is some schedule 40-compatible product that is essentially a switch, basically a Y, and if the switch is set one way, water goes to the left, and if switched the other way, water goes to the right.
The hardware store employees said there is no such way, I need to setup two shut-off valves. That would lead to a lot of confusion in my situation and also could cause problems, as the pump does build up some pressure in the pipes.
Is there some product for switching the water to another pipe?