apartment therapy changing the world, one room at a time

I have a showerhead by Evolve with this technology built into it, and it's great if you have a traditional water heater. Unfortunately, I upgraded to a tankless model a few months ago, and it doesn't let enough water through to keep the tankless water heater running.

This doesn't seem to solve the problem of wasting gallons of cold water that are going down the drain anyway.

Sorry, but this seems to be one of those "don`t think, we`ll sell you a nifty gadget which will replace your common sense" ideas. You all already have a great "water saving thingy", a two-piece set of your brain and the shower valve. Is there a need for anything else? And yes, this adaptor doesn`t do anything to shorten waiting for warm water while gallons of cold one go down the drain. A really sensible (and green) solution would be adding a tankless high-power water heater near the shower and connect it to the pipes from the main water heater. Here`s how it works: you open the valve, water starts flowing, tankless heater kicks in and heats the water quickly, while hot water from the tank travels through the pipes. When hot water from the tank reaches the tankless one, it turns off and just lets the hot water flow through it. Simple and effective, and you have hot water without waiting. Of course, the tankless electrical heater needs a lot of power (about 14kW), but it would be running one-two minutes per cycle at most. Small difference in power consumption, quite big in water usage.