Those generic one gallon jugs they sell water and milk in are pretty leak prone. We usually buy them once and then refill them multiple times, and I’d say 50% failing after six months seems about right. Granted we’re moving them around a lot, as opposed to just stowing them in the basement.
Before we installed a treatment system (sulphur water) that solved the problem, all our drinking water was bottled. I don’t like shopping, so a few times a year I’d take the van to Sam’s Club and pack it to the brim with water. We were never too careful to turn our stock over, but never had a leak problem. Over time, some cases definitely sat for over a year–particularly the fifteen to twenty cases of accidental packaging (meant to get jugs; ended up with the 2.5 gallon brick).
We normally bought Poland Springs (what Sam’s carried mostly), but there was a lot of plastic moved through here.
The latest generation of plastic container is mighty thin. Most will spring a leak if you look at them wrong. For long-term storage you need something heavier.
I’m not disputing anyone else’s experience, but I bought a gallon jug of distilled water for my car battery about five years ago, just used a little bit of it, and stuck the rest in the fridge. It’s still there, not leaking, in the original jug.
The containers are getting thinner and thinner, both the transparent (sport bottle size) and translucent (1 gal and 2.5 gal size). I have to laugh when I see “Doomsday Preppers” and people show off their stockpiles, and they have cases of water. It will turn into a big uh-oh LONG before the Apocalypse.
Potable water storage barrels are recommended for people who wish to store water for an emergency. If you are too cheap to spring for those, your best bet is to thoroughly wash and rinse 2-liter soda bottles and fill them with water. Since soda bottles are designed to hold the contents under pressure, the plastic is a heavier gauge and will last longer than regular bottled water.
~VOW
We buy earthquake water (for when the big one hits) in jugs > 1 gallon, and rotate them after a year. We’ve been doing this for a decade, and never have had a leak. We don’t touch them between the time they come back from the store and we bring them into the kitchen to use, though.
For the 20 gallon you still need to rotate, which is a pain, they do sell 30-55gallon plastic drums I’ve found, but more than I’m willing to bother with at this point though, rotating those would be quite an effort. Should build in some release valve/hose attachment at the bottom so you can water plants with the one you are rotating out…