RV Hot Water Heater Drain Plug - Solid for Motorhomes, Travel Trailers, Boats, Etc.

thingiverse

Remixed from another design. Made the plug solid and slightly enlarged the threads 3 percent for a better fit. Head was shortened and made to fit a 7/8" (22mm) wrench. Use teflon tape around threads to ensure a water tight fit. I made this after the hollow plastic one on my motorhome broke. I also tried a hollow part design but it wasn't strong enough and it broke too. To get the hollow type out, I used a bayonet knife that's tapered at the end, stick it in until you can't and then turn it out. Hope this works as well for you as it did for me.