This is a video that has easy step by step instruction on installing the Camco Tornado rotary tank rinser. This little devices is so worth installing in keeping your black tank flushed out. The install time is about 15 mins. Below is a list of tools you are going to need

Key Features
Helps thoroughly flush the RV holding tank
Permanently installed builtin back flow preventer
Hook the garden hose to the connection (outside RV) and flush for 2
minutes or until water from discharge hose runs clear
No need to bring a hose in through the window


Tool List
Screwdriver
Drill
1/8 drill bit
1 3/4 inch hole saw
Silicone Sealant
Tape Measure
Tape
Scissors

******* UPDATE *************
31521 This by far is the best upgrade I have made and highly recommend it! It works so amazing and so easy to use when cleaning out your black tank. It is so convenient!
Pick yours up today!https://amzn.to/3YiDPqL