second day with hot water.it works well!im happy despite the crap weather!

i want to get into the habit of draining the heater as one of my end of the day jobs.i unscrewed the drain screw at the bottom after work again today and it spewed water everywhere(all out the bottom even where the batteries are!

)hope ive not damaged it!

.
whats the best way?can i not just unscrew the hot outlet pipe and let it drain out from there?
cheers guys
dazmond