Question 1

What is RainWater Manager?

Accepted Answer

RainWater Manager is a web app built specifically for homeowners and properties that collect, store, or haul their own water. It tracks tank levels, estimates rainfall collection, manages filter maintenance, and scores your overall system health — all from one dashboard.

Question 2

Does it work for hauled water (water delivery) properties?

Accepted Answer

Yes. Log every delivery, track your burn rate, and see exactly how many days of water you have left. The app calculates days-until-empty based on your household's daily usage so you can schedule the next haul before you run out.

Question 3

Can I manage multiple water systems on one property?

Accepted Answer

Yes. You can create separate systems for each distinct use — for example, a potable house system, a greenhouse drip line, and a barn non-potable supply. Each gets its own health score, autonomy calculation, usage tracking, treatment chain, and maintenance schedule.

Question 4

How are rainfall collection estimates calculated?

Accepted Answer

The app uses your roof's square footage and runoff coefficient combined with a 10-day weather forecast from Open-Meteo to estimate how many gallons each surface is likely to collect. If you connect a physical rain gauge (Ecowitt, Tempest, or Ambient Weather), the forecast is automatically calibrated using your local measurements — the more rain events logged, the more accurate the estimate becomes.

Question 5

What filtration stages are needed for potable rainwater?

Accepted Answer

The System Designer walks you through the full treatment chain. A potable-certified system generally needs a pre-wash screen, first-flush diverter, multi-stage sediment filtration, activated carbon, and UV sterilization. The app tracks which stages are in place, flags anything missing, and alerts you when components are overdue for replacement.

Question 6

Can I connect a weather station to the app?

Accepted Answer

Yes. Ecowitt, Tempest (WeatherFlow), and Ambient Weather stations are all supported. Once connected, your station's rain gauge readings replace satellite estimates for past collection history and are used to calibrate the 10-day forecast going forward. Each water system on your property can be linked to a different station.

Question 7

Is it only for rainwater, or does it work for other off-grid water setups?

Accepted Answer

It works for any property managing its own water supply — rainwater catchment, hauled water delivery, spring-fed tanks, or a mix. The water source doesn't matter; what matters is that you're tracking what's in your tanks and planning around what's coming in.

Question 8

How much does RainWater Manager cost?

Accepted Answer

RainWater Manager is $49 per year — less than $5 per month. All features are included at that price. There is a free 30-day trial with no credit card required to get started.