I change a bunch of oil and over time by turning the empty qt bottle upside down for 24hrs I collect a quart of oil pretty quickly. I used to do it one at a time over another quart. So I came of with this idea to where I can do 5qts at one time. I can add to it if I want, some of my oil changes are 8qts. I do use gallons and have not tried to put a gallon on here but think I can make it work. It is still work in progress as to how I want to mount it. Didn't want to screw into the garage wall, thus the reason for the plywood and rubber tubes holding it up. I also chamfered the inside of the pieces so the oil would run down and not collect on the inside of the connections. I looked all over to find the best price on the fittings and it turned out our local Ace Hardware was the cheapest, even less than Lowe's. I washed everything out really good to make sure there wasn't any plastic dust from all the grinding with my dremel. Now let the oil changes begin.