Top 10 Best Instant Hot & Cold Water Dispensers – Expert Picks for Quality

Customer Review: The InSinkErator HOT250 has been a fantastic addition to my kitchen. The ability to instantly dispense both near-boiling hot water and cold, filter-ready water right from the same faucet is incredibly convenient. Whether I’m preparing tea, warming baby bottles, or quickly rinsing dishes, this system handles it all with ease.

Customer Review: Excellent product. I’ve had several over the past 30+ years. I like this one best because it provides instant hot water, and it also can dispense filtered cold water eliminating the nasty chlorine taste. I purchased this one as a factory refurbished model with the same warranty as a new one. Unfortunately the heating unit was not as good as new. It never heated the water above 149 degrees. BUT, the manufacturer’s service department was excellent. One short phone call to explain what was happening and a replacement was shipped without delay. The replacement works just fine.

Customer Review: Great to have if you are getting hot water frequently. Previously we would boil water in the morning, put it into a coffee thermos that would keep it hot all day. Now we can get hot water when we like. Have my French press full of coffee any time, faster than using a Keurig. It gets 5 stars because it does what it says, and has a nice faucet, safety feature for the hot, and works without issue, but it still could do it better.. the cons

Customer Review: At our last house, I installed the similar InSinkErator instant hot water dispenser + faucet. We loved the convenience (tea and cocoa) and the utility (speeds up boiling water and great for cleaning stubborn food grime). But two issues with it:(1) The installation was a pain, since the faucet had to be secured from underneath the countertop. That meant wedging myself deep under the sink and awkwardly reaching up behind the sink to tighten the large collar/nut.(2) The faucet, although it worked well, loosened up over time and there was an annoying amount of “slack” in the handles, resulting in occasional leaks from the faucet. I tried tightening the small allen screws in the back (awkward to see/reach), but it didn’t help.I can’t yet speak to the long-term durability of this Ready Hot Water Dispenser, but the installation was definitely easier in this regard; they have a clever system where the collar folds in half in order to squeeze through the counter hole, then is pulled up with two plastic attachments before it is screwed down in place. Much easier to do and no need to crane awkwardly behind the sink. The faucet looks great and feels very solid. The digital thermometer is great and allows for precise adjustments; I definitely tasted a difference between 180 and 185.The only downsides I can think of (compared to the InSinkErator unit) are (1) the tank is larger here, which means it takes up more room under the sink–not a big difference though, and (2) the faucet is definitely taller. Not a bad thing per se, but if you’re looking for a small or more subtle faucet, this probably isn’t it.Overall, very pleased with this purchase. The quality is excellent, and considering it’s about $150 cheaper than the InSinkErator unit, it’s really a no-brainer.Aside: Highly recommended to install with the Filtrete water filtration system!

Customer Review: The InSinkErator HOT250 has been a fantastic addition to my kitchen. The ability to instantly dispense both near-boiling hot water and cold, filter-ready water right from the same faucet is incredibly convenient. Whether I’m preparing tea, warming baby bottles, or quickly rinsing dishes, this system handles it all with ease.

Customer Review: Excellent product. I’ve had several over the past 30+ years. I like this one best because it provides instant hot water, and it also can dispense filtered cold water eliminating the nasty chlorine taste. I purchased this one as a factory refurbished model with the same warranty as a new one. Unfortunately the heating unit was not as good as new. It never heated the water above 149 degrees. BUT, the manufacturer’s service department was excellent. One short phone call to explain what was happening and a replacement was shipped without delay. The replacement works just fine.

Customer Review: As someone who values both convenience and innovation, this smart dispenser has exceeded my expectations. Being able to pre-heat water remotely means I can start brewing coffee as soon as I walk in the door. The app interface is intuitive, and the temperature accuracy is impressive—perfect for delicate teas that require exact heat levels.

Customer Review: Installation took less than an hour, and the setup process was smooth thanks to clear instructions. The large tank keeps up with my family’s needs, even during weekend brunches. My only minor complaint is that the app occasionally loses connection, but support responded quickly when I reached out.

Customer Review: I upgraded from a basic electric kettle after installing this unit. The difference is night and day—no waiting for water to boil, and the temperature control is spot-on. The brushed nickel looks fantastic in my kitchen, and I appreciate how it doesn’t show every little smudge.

Customer Review: Works exactly as described. The digital readout makes it easy to set the perfect temp for oolong tea, and the installation was smoother than expected. Only downside is the noise during heating, but it’s not disruptive.

Customer Review: Love our new Instahot spicket. Had a contractor friend come install it for me. He was able to mount it underneath the sink next to the filter, so it’s all pretty much hidden from view. He was able to hook up the filter easily so now the spicket provides hot and cold filtered water 24/7. The water is hot, so be careful. He recommended 2 shy of the hottest setting and he was right, it provides water hot enough for a very hot cup of coffee or tea. This thing makes me smile just about everyday. We also ditched our electric hot water pot…which gave us more room on the counter.

Customer Review: So far so good. Amazing how this thing works. Unit is quite and can fill a medium pot to 150 degrees without stopping, trust me I measured temperature. Unit is great package it comes with tank and installation is somewhat easy. Hoses just slide on and click together. Just remember that you will need to “Y”or”T” your supply line, as these parts are not supplied. A great looking unit. Cold water is not chilled by the way just comes out normal temmperature.

Customer Review: Paired this with the HWT-F1000S tank and couldn’t be happier. The single handle makes switching between hot and cold effortless, and the satin nickel finish ties everything together beautifully. Installation was straightforward, and the water flow is strong and consistent.

Customer Review: I was initially hesitant about buying a separate faucet, but it turned out to be worth it. The build quality feels premium, and the lever mechanism is smooth and responsive. Just remember to budget extra for the tank!

Customer Review: Switched from a dual-handle model to this single-lever version and love the difference. It’s quicker to operate, and the pull-forward mechanism is really thoughtful. The temperature dial is smooth, and the water comes out consistently hot.

Customer Review: Great upgrade for my morning routine. No more fumbling with two handles—just one smooth motion to get the exact temp I need for pour-over coffee. Looks great too!

Customer Review: This is the third instant-hot hot/cool water dispenser combo I’ve installed in my kitchen. The first two were ISE/Insinkerator brand products that failed after 7 years or so when the boiler started to leak. No other plumbing item in my home has as short a lifetime as those ISE instant-hot water systems, so this time I went looking for a different brand.At $210 for the faucet/boiler combo, better than a third less than the cheapest ISE brand alternative, I was a little worried this system would look cheap. I am delightfully surprised. If anything it makes the ISE combos look shoddy. The Ready Hot faucet is sharp looking and a better build quality than its competitor.The faucet install was easier than ISE, too. With ISE the whole faucet unit is installed with a single plastic clamping nut, so you have to go underneath the sink to install the nut, come back out to check alignment, back underneath to tighten some more, back out for a final check, then back below for the final tightening. The ReadyHot faucet has a separate mounting ring and clamp assembly that you can install entirely from above, if you like. (ReadyHot has a nifty folding clamp ring that cam be dropped through the hole then held in place with a piece of string. The approach looks really well thought out and would work well for a single installer. In my case I asked my wife to turn the two screws a few times from above while I held the folding clamp ring in place from below, then went back topside to tighten them down.) Then you set the faucet on the base and lock the alignment in using a set-screw on the back. Much easier.The rest of the plumbing process was same-same between ReadyHot and ISE. The ReadyHot system comes with everything you need to connect it except the physical junction to connect to your existing plumbing. Since my project was a simple swap of an old boiler/faucet set with a new one all I needed from the hardware store was a cone compression washer and sleeve that cost less than $2 at Home Depot.If your project isn’t replacing old hardware, do remember you’ll need a 120v electric plug under the counter at your sink to plug this unit in. In most cases you can use a garbage disposal or dishwasher plug-in connection for this. Beyond the electrical connection and standard handyman tools all you’ll likely need to complete a new install is a 1-3/8″ hole saw and T junction plumbing hardware appropriate to your existing undersink plumbing.Pros:* Really nice faucet unit. Looks like a quality bar sink faucet set. (See pics) Best build quality and finish I’ve seen for a hot/cool water system.* I really like the high arch of the faucet head, 12″ at the top of the arch & 9″ at the tip, and that I can set a coffee a carafe or coffee machine reservoir on the counter then twist the head to the left or right to fill it.* Less expensive than other instant-hot systems.* Faucet and boiler tank can be purchased separately (and and affordably).* Easy install for an experienced handyman. (Slightly more difficult than replacing a standard faucet set.) Hardest part is the getting in and out from under the sink. :-)* Clear-ish instructions. If you’ve done home plumbing repairs before you’ll be able to figure them out pretty quickly. (See Cons, below.)* Almost everything you need to finish the job, other than standard handyman tools and a 1-3/8″ hole saw, is included in the box. The only additional item needed is plumbing hardware appropriate to connect the unit to your existing plumbing.Cons:* The instructions are fine for folks who’ve done a few home plumbing projects already, but could be clearer. Some photographs or illustrations might be handy.* If you’re doing a fresh install — in other words, not replacing an old instant-hot system — you need to be comfortable doing plumbing projects. If you’re new to plumbing you might want to do a couple other projects first. You might try installing a new kitchen faucet to match the looks of the instant hot water faucet, before you take this on.* My experience with ISE brand instant hot water boilers has been they started to leak after about 7 years. That’s a much shorter lifetime than any other plumbing item in my home, and I don’t know if this Ready Hot unit will last longer. I really hope it does. If it fails sooner I’ll come back and update this review.

Customer Review: This ReadyHot Hot and Cold Dispenser seems to work very well, looks good and was a straight forward installation/retrofit for the existing unit. I already had the water supply T and shut of valve, as well as an inline water filter from a previous hot/cold installation. The electrical outlet was already under my sink for the garbage disposer unit, so nothing to do for the electrical. Because of the previous installation my retrofit time was somewhat less than if I had started from the beginning of the process. (Note: The ReadyHot system that I purchased here did NOT include a filter). I just needed to provide an extra tubing coupler to add to the parts included with the Hot and Ready kit. It was available at my local hardware store for less than $4.00.After using a hot water dispenser on our sink for years, it is hard to imagine being without the convenience of having instantly available hot water for making tea and other beverages, as well as for quick cleaning tasks, and quick cleaning of dishes/utensils.It replaced an 8 year old Little Butler hot and cold dispenser, which was much more expensive and had developed problems over time. We liked the Little Butler until it started to cause problems, but its design and connecting hose materials caused leaks under the counter at unexpected times. More than a few times, it caused a mess of leaking water and damage to our cabinetry. Its upper faucet valves started leaking onto our counter and would not shut off reliably. The Little Butler is not made to be repaired, although I took it apart and did receive the hard parts that I could get from the manufacturer. For as much as the Little Butler costs, it was very disappointing to find that out it is assumed the customer will consider it a throw away item. That said, I was able to extend the life of our Little Butler by replacing some of the tubing and some of the hot and cold lever shut off parts.They had used latex tubing for the main faucet tubing and that disintegrates and bursts. I had done several repair over the years to various parts of the Little Butler, but the manufacturer tech support says that they are not actually user serviceable. To my knowledge, they have not upgraded these components to change that. Therefore, this time I looked for an alternative.This Ready Hot appears to have better build quality overall than the Little Butler, but time will tell for longevity.The price of the Ready Hot units is right. Again, I had no issues in the installation. If you don’t mind spending an hour or two under your sink cabinet with a light and some basic tools, you can install this unit yourself. For someone without any electrical or plumbing experience, you will need to hire a professional. That would be true for any brand or model.Although I don’t have any reason to suspect that the Hot and Ready unit will leak under the sink, I will continue to keep a catch pan under the hoses and heater unit just in case. I have read about disasters from leaking heating units and hoses from other users of the various brands, so it is wise to add a little protection.Note: I spent a lot of this review on the old unit rather than the one we just purchased. But that is because we have only been using the new one for a day. Perhaps this will help someone deciding on a purchase.In conclusion, I am very happy with the Hot and Ready hot and cold dispenser.

Customer Review: This is a highly-rated hot water tank made by InSinkErator. It is easily operated with a dial that allows you to easily set the temperature. Simple and effective and and easy DIY installation if you’re handy. I purchased this along with the InSinkErator instant hot water dispenser and they work very efficiently. You can hear the hot water tank warming the water but it is not for a long duration or very loud.

Customer Review: This was a great replacement and was the exact same model. It was easy to change and is working so far just great. Love the convenience of having instant hot water, but unfortunately, these tanks are not a long-term item. Usually good for a few years sometimes longer. Appreciated the lower price.