another thing about this 1 and a quarter diameter hose - you can take the head off the shower and the bend in it will hold the hose on so you can fill it easythe first 2 posts give good advice
for faster draining - I use a 1 1/4 inch diameter hose - I picked up a 22 foot length from Lowes Home Improvement - it was a bit costly until I drained the 210 gal tank QUICKLY
for my RO/DI water I went to Lowes and bought a pond pump with the 1/2 inch diameter discharge and a length of their hose that you find right there made for ponds (its a 20 footer) and I hit all my tanks real easy with a powered water supply!