*PLUMBERSSTOCK EXPERT* responded:
Hi, there! Thank you for taking interest in our Sioux Chief 802-7 drain backwater device. If you're gonna install this on a trap floor drain, you'll only need a screwdriver (Philips or flat, depending on the screws used ) for the most part. You just need to unscrew the trap floor drain and screw the drain backwater device by hand. You have to make sure first that your trap floor drain is compatible with the drain backwater device that you want to purchase. Here is a specification sheet for additional reference. Hope this helps! Thank you and we hope to see you again here at PlumbersStock.com!