Jun 17, 2022 · Use a fuel standpipe that’s cut to allow a minimum of 25mm from the bottom or at the very least side-mount the fuel tank nozzle. [if your diesel heater doesn’t come with one, they’re less than $10 here on Kingclima] 10. Drilling a hole in the floor from the top down. If you’re using a hole saw and you only drill from the top down it chews