We just installed our second Insinkerator instant hot water heater. We've had one in our main kitchen sink for years (maybe 10? at least 5) with no problems. Just put in a bar sink in our pantry and put a second one in there for tea (and instant simple syrup for cocktails) - which seemed like a ridiculous indulgence but with all the $ we spent on the cabinets not so much. This area is quite small and narrow and there was an issue with space. There's also a garbage disposal - had to work to make sure everything would fit but it did. The first one, we bought maybe the second cheapest model from HD, and the one we just bought was similar. The big price differentiators seem to be 1) adding filtered cold water and 2) fancy spouts. We opted for the simple spout with a red dot on it, which helps people know what it is (we have a lot of guests). Obviously we've been more than happy with ours.

I am on my second In-Sink-Erator H990W-SS instant hot water dispenser. It has a 2/3 gallon stainless steel tank under the sink, and I use it constantly. I had the first one for about 10-12 years I'm guessing, and it only failed because the electricity was upgraded in my neighborhood, and since I already had it cranked up to its maximum temperature (200º), something apparently blew and it stopped heating. But it never leaked. This model is not the most attractive one, but it's the only one that will work in my kitchen sink, and it serves my purposes very well. You can also find models that dispense both hot and cold water.

the above post is spam. serawyn, the answer is no, to the specific question in your post. the answer is yes, to the general question in your thread title. look underneath any instahot (IHW) faucet; you will see three pipes (or three hoses). But, a water filter faucet does not have three pipes or hoses. - ask in a plumbing forum to get more information.

if you already own a hot-only Insinkerator, you may as well not upgrade to the other one. they're expensive. the filtrete thing is very affordable (and super easy to put in). our filter is on our main sink faucet, which works fine for us because we don't use that much water (only two people living here). it's not slow like a brita or those little filtered water taps that are installed next to a faucet. but note that it's because we use the "least" amount of filtration-- it filters for taste, not safety (our city water is safe). I read the ones that are meant to super clean the water are slower. one big advantage is that all of our water for ice cube trays, coffee, boiling pasta, etc, is filtered. I don't notice a taste difference in the food, but my husband swears he does.