The whirlpool may be usable with a Hopstopper or other screen when you're recirculating for the whirlpool the "draw" from the kettle to the pump is from a coupler higher on the kettle than the drain, e.g. the one used for the thermometer. The thermometer and the whirlpool can share the coupler with a Tee if you use a thermometer with a 6" probe that goes through the top of the Tee into the kettle, and you have a valve on the "bottom" of the Tee. This way the drain screen doesn't get clogged during the whirlpool circulation.
I've not tried this, but it just an idea ...