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Pumps with timers can void your tankless warranty. Tankless water heaters are not designed to run full time. There are systems designed for tankless water heaters and dead-end lines. WaterQuick Tankless, ACT D'Mand and Chilipepper all work with tankless water heaters. Please note that I work...

I would be willing to donate a home hot water circulation system for your students.

So how much was it before you insulated the pipes? The reason that I ask is that most water pipes are hidden in the walls and in older homes they are not insulated.

USMC thanks for bringing up some valid points. I will address them as best I can. I’ll explain later in this post why we do not have to violate the laws of physics to do what we do. Believe me when we were in the development process on more than one occasion I wished we could have. A...

Speedbump, I can see that you don't understand how this thing works, I get that a lot. I don't understand how electricity makes my toaster work - but because I don't understand it doesn't mean that it doesn't work. As I mentioned in my comments above this is a product that my company sells...

John, at least we can agree on one thing - installing the pump at the water heater is the best solution. That is where the Grundfos system is installed and that is where the WaterQuick Pro II is installed as well. However, a point of clarity on the Bridge Valve. When hot water reaches the...

Speedbump, I am not sure about where you live but In San Diego years ago electricity (as well as water, sewer and gas) was very cheap. So an increase of 23% wouldn't hardly be noticed. Today that can be a number that people pay attention to. The idea of conserving is defeated if we exchange...

John sorry about not being clear on how to operate the system. The way it works is turn on a hot water faucet and then turn it off. Wait about 10 second for the pump and Bridge Valve to do their job and you will have hot water where you need it. Turning on the faucet is like a light switch -...

Interesting point of view John. When you say that these are not pumps, they are circulators (I assume that is what you meant - not calculators) you say it like that is a bad thing. Circulation pumps, or circulators, are used in many applications including hotels, apartments and homes. The hp...

Hot water circulation lines were designed to provide hot water immediately at a faucet but studies have shown that the convenience of having hot water immediately may save water but it is more than offset by the cost of keeping the line hot even when no one is using hot water. The WaterQuick...

The Grundfos is a nice system but even though it saves water it increases your energy costs. A demand style system like WaterQuick Pro II only works when there is a demand for hot water. Installation is exactly like the Grundfos system but without the long term energy costs.That probably isn't...

WaterQuick Pro II