Hey techies! We’re trying to figure out how to provide a safe water supply in the age of Covid. We’ve typically run a fill station as a bathroom sink, with a pressure pump feed from a standard supply tank. Looking for a solution which eliminates the need for human process which may or may not happen...

Impressive. What did you do with the greywater? Was there enough to be a concern? The hot water system / reservoir had no direct wastage; users would fill a bucket from it to fill the shower, and all the water got used up. We had a simple tarp for spillage. The shower was a simple pump sprayer with...

Another suggestion that was made to me for a cheap metal accumulator was a car radiator.

It wasn't clear from my description, but I did use aluminum sheet backing behind the coil, the entire area of the wood boxes. I looked at PE pipe; my concern would be melting it. Others suggested black rubber hose, which would work and be cheap...but then your showers would all smell like tires. :) ...

The design was based on a concept that used PEX pipe, so it's indeed possible: http://rimstar.org/renewnrg/diy_pex_solar_hot_water_thermal_dn.htm I wanted maximum absorption in a compact design that I could fold up into a suitcase (the wooden boxes are hinged and have a clasp so that this can be don...

I built a solar hot water heater (The SunSpa) this year for our camp, and in spite of my firm convictions to the contrary, it worked like a charm! The heater brought 100 qts of water from ~70 degrees to ~110 degrees in about 4 hours, enough with one refill per day to provide hot water for all the sh...