Was tempted to put this in the "garden pron" thread since it'd mainly be used to water our garden, but thought it could use an entirely new thread. Our water is fudgin' expensive ($50/month when we're *not* watering our garden/lawn), including only one meter that counts towards both water *and* sewage. So if we water our lawn, it still counts as if it was being dumped back into the sewer system... We got a small (49g) decorative rain barrel for the front spout, but it's about 3/4 full from just a short rain overnight. We can get surplus 55g barrels from the University for $5 apiece, and PVC is cheap, so I'm thinking about setting up a bigger system in the backyard, especially after seeing some setups online: Anyone try something similar? So far, the biggest down downsides I can see are: 1) Only ~$20/month is for the actual usage, everything else is flat "service charges". Actual savings would probably be pretty low (kind of like our tankless water heater which halved our NG usage for heating water, and it saved us ~$7.50/month). 2) Ideally I'd like to set it up for a drip irrigation system for our garden, but the dirty water apparently clogs the holes that you put in the PVC pipe (also, it'd be a low-pressure system which makes drip irrigation more tricky). 3) It means that I'll have to clean out the gutters far earlier in the spring... Upsides: 1) It's GREEN!!! 2) Setup would be cheap. $5 barrels + some PVC piping/faucets + cinder blocks to get it up a bit higher (more water pressure) would probably be under $30-40 or so. 3) Saves us from the "waterlogged backyard" problem. Our property is flat, and so to alleviate backyard flooding we ran the downspout underground, then did a perforated pipe, then exiting into a small rock-filled trench away from the house. Most of the time it works well, but for long and sustained rains it gets a bit soggy. This wouldn't completely eliminate it, but would divert 150-200 gallons (depending on setup) into storage. Thoughts? Anyone try this and have drastic words of warning?