Matt Risinger shows us his flood protection pans for his appliances. These simple bent sheets of steel can protect your floors and prevent disasters if an appliance were to leak. 

Infographic from: https://www.waterdamagedefense.com/
Oatey Drain Seal: https://www.oatey.com/products/oatey-drain-seal--1553341598
ToughBuilt Knee Pads I use: https://toughbuilt.com/product/gelfit-fanatic-thigh-support-stabilization-knee-pads-1
My dishwasher: https://www.mieleusa.com/e/fully-integrated-dishwashers-g-7566-scvi-autodos-clean-touch-steel-11388140-p