What does a pool pump motor sound like?

I am doing some foley work and I've been asked to create the sound of a pool pump motor. The problem is that I haven't been to a swimming pool since last summer, and as it's now November, all the pools are closed. Can anyone describe in detail what a pool pump motor sounds like? Or can someone tell me what some things are that sound like pool pump motors? Better yet, if you've got some video of pool pump motor maintainence that shows the pump turned on and you can hear it, I'd prefer that. So can anyone help me?