I have two large evaporative coolers that tend to get clogged with minerals from my hard well water over time, so I took a chance and installed a G2P600 RO system on each cooler. The coolers drain and refill automatically every 4 hours, so to provide enough output for a 5 gallon refill quickly I added a 5.5 gal. pressure tank to the system. The systems are working perfectly, providing plenty of output for the timed refills plus evaporative usage, and lowering my water's TDS from 180ppm down to 25.
Our plumber had never heard of Waterdrop before and had given up on tankless RO systems, BUT the G2P600 changed his mind! He was amazed that he didn't need to use any of his own fittings or tubing - said it's the best complete kit he's ever seen in 40 years! As for us "users" - we were thankful to see how easy it is to know when it's ready for drinking (the flashing blue light becomes a solid light), and the taste is as if it came from the best aquifer in the country! (Which we have had at one time.) We also had the water quality tested and it was far superior to our well, the City supply, and the most expensive bottled water. Wow! Thank you, Waterdrop, for having a quality product and some honest integrity to go with it.