Quote:
Originally Posted by hcoles
I'm using the Watts system from HomeDepot. It uses the cold water pipe as the return. Easy to install works good enough. Saves adding a pipe for the return. Works on a timer.
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I've had a system like this for a number of years (15+). The issue here is that, while the hot water is pretty much instantaneous, if you want cold water, it is not cold (you have to wait for the hot to flush through). For systems that have plumbed a completely discrete hot return line, that's great for new construction, or major renovation work, but more challenging as a more basic add-on. Still, at our house, we use more hot water, and more often, than cold, so the cold return method is still pretty good.