Rain Barrel Installations:If you would like, we can install your rain barrel(s) at your home. If you need guttering, we can install that as well. Fee for installation will depend on size of job. Installation includes creating a pedastal (probably of cement blocks) for the rain barrel to sit on for access to spigot and optimal water pressure.Rain Barrel Systems and Cisterns:Even more water can be collected if you connect several rain barrels together with PVC pipe. Each barrel holds about 50 gallons of water, so obviously, three can hold 150 gallons.