RainSave
The Journal
How Much Rain Can You Actually Harvest From Your Roof?
The math behind rainwater harvesting is simpler than it looks — a fixed conversion constant, your roof's footprint, and local rainfall are all you need to get a real number.
First-Flush Diverters Explained: Why the First Few Gallons Matter
The first water off any roof carries the dust, pollen, bird droppings, and grit that built up since the last rain. A first-flush diverter routes that dirty water away before it reaches your storage — here's how to size one.
A Home Water Audit: Where Does It All Actually Go?
Most households have a rough sense that showers and toilets use a lot of water, but few can say by how much. A simple room-by-room audit turns that hunch into real numbers you can act on.
The True Cost of a Dripping Faucet
A faucet that drips once a second looks like nothing. Run the numbers over a year and it stops looking like nothing — here's the arithmetic and why fixing it is almost always worth ten minutes with a wrench.
How Much (and How Often) Should You Really Water Your Lawn?
The '1 inch a week' rule is a good starting point, but a fixed schedule ignores your soil, your sprinkler's real output, and your climate. Here's how to build a schedule around actual measurements instead of guesswork.
Greywater 101: What You Can (and Can't) Safely Reuse
Not all household wastewater is created equal. Understanding the difference between greywater and blackwater — and what greywater can realistically be used for — is the first step before considering any reuse system.
Low-Flow Fixtures: Which Upgrades Actually Pay for Themselves
Not every water-saving fixture swap is equally worth it. Comparing the gallons saved per fixture against typical replacement cost shows which upgrades pay back fastest — and which barely move the needle.