Tekscrews Also Known As Self Drilling Screws; Drill Their Own Pilot Hole In Thin Sheet Metal. Tekscrew Design Features Pointed Drill Bit At Top Of Screw. Normally To Be Used Together With Bonded Washer.
Intallation was straight forward once you understand what all needs to be in the initial kit (element, thermostat pocket, kwikot flange). I opted to use a seperate compatible thermostat to connect the system to my existing CBI Geyser controller. From cold it heated up in about 2.5 hours and happpily runs through my inverter on solar during the day.
