InSinkErator Involve Instant Hot and Cold Water Dispenser

The product works quite well once installed - no over-pressure drip problems like earlier undersink dispensors used to have. Heats water quietly and quickly, and 2/3 gall tank is more than enough for most uses. The plumbing is solid brass (flexible) and is brazed well to the base.

HOWEVER - This product, as shipped, it only for enamel or stainless steel surround sinks. The threaded base is only 1 inch, meaning that for any solid surface (granite, corrian) countertop, it doesn't extend below the counter surface to attach the retaining ring. For anything an inch or thicker, you must purchase an EXP-10 extension screw base for approx $25.

Effects of the EXP-10 extension:
The long length of the extention makes it difficult to get over the various nuts and connections attached to the dispensor - you may have to temporarily disconnect some of the compression fittings until you get the extension over them.

More importantly, in order to screw...Read more

I bought this product as a replacement to my existing insinkerate instant heat and water since my last one was about 10 years old and the heater finally gave out. I think this is an excellent product the heater is quiet and extremely efficient. The instant works great for making tea, instant oatmeal and clean plates with stuck on food. The integrated tap for dispensing filtered water is excellent we are a very active family of four and we are always drinking water, the dispenser is fast enough not to be annoying. Can easily fill a 32oz camel back bottle in less then 30 seconds. The design and fit an finish of this product is the best I have seen in this class and for the price this is the best deal out there. My only criticism is the install manuals is really not the best, if you are not comfortable with doing minor plumbing work then find a friend that is...this was not at all easy to install. Especially if you plan on adding a water filter - which really if you get this model...Read more

The Wave Transcape works well, producing ample amounts of hot and cold filtered water (easily several cups at a time). Once installed, the "quick connectors" made it very easy to hook up the supply lines to the water tank.
However, the previous review was completely correct. The product is not designed for the granite/stone countertop market that its price would suggest. It COULD be installed, however, installation required sanding out the existing hole in our countertop to widen it, and was much more work than it should have been. Our existing hole had perfectly fit the in-sink-erator water dispenser that was being replaced.
One other difference betwen dispensers is that the faucet of the previous models could swivel, where the wave transcape faucet is fixed.