When Karen remodeled her kitchen, she had a clear vision sleek cabinets, granite countertops, and a hot water dispenser right next to the sink for her morning tea. After browsing options online, she found the perfect InSinkErator hot water dispenser along with the matching installation kit. Confident in her DIY skills, she figured installing an instant hot water dispenser would be a simple weekend task. After all, how hard could it be? But when the kit arrived, reality hit. Inside the box was a tangle of hoses, fittings, and a surprisingly bulky under-sink tank. As Karen flipped through the installation manual, her confidence began to fade. The instructions mentioned tapping into the cold water line, adding a T-valve, mounting a new faucet, and even modifying the cabinet to make room for the tank. This wasn’t just plug and play it was full blown plumbing.
Karen knew her beautiful new kitchen wasn’t the place to risk a leak. So instead of pushing forward solo, she called Fast Plumbing and Drain for professional help with her hot water dispenser installation. A certified plumber arrived the next day and got to work. He carefully connected the tank to the cold water supply, installed the T-valve, and mounted the sleek InSinkErator instant hot water dispenser faucet seamlessly into her countertop. Within a couple of hours, the system was fully operational no stress, no cabinet damage, and definitely no leaks.
Karen was thrilled. Her new hot water dispenser worked perfectly, delivering near boiling water instantly for tea, oatmeal, and more.Whether you’re dealing with a standard unit or a more complex InSinkErator hot water dispenser installation, sometimes it pays to call in a professional. If you’re considering installing instant hot water dispensers in your home, trust the experts who can get it done right the first time so you can enjoy instant comfort without the hassle.
Installing a hot water dispenser might seem like a straightforward job, but it’s often beyond the skill range of a typical do-it-yourselfer for several important reasons:
A hot water dispenser must be connected to the cold water supply line under the sink, which typically requires cutting into an existing pipe, installing a T-valve or saddle valve, and ensuring watertight connections with the correct fittings. A small mistake here lead to leaks, flooding, or long-term water damage—especially inside cabinets.
Proper installation requires pipe cutters or tubing wrenches, teflon tape or thread sealant, crimping tools (for PEX or copper), and drilling and hole saw (for mounting the faucet in the countertop or sink). Many DIYers don’t own these tools or may not know how to use them correctly.
Mounting the faucet component usually requires drilling a clean hole through the countertop or sink deck, proper sealing to prevent moisture damage, and precise placement so it’s accessible and visually aligned. Mistakes here can permanently damage expensive surfaces.
The dispenser includes a pressurized tank heating water to nearly boiling. A loose fitting or incorrect pressure setting results in leaks, scalding hazards, or damage to the dispenser or plumbing system. Licensed plumbers know how to test the system thoroughly before turning it on.
In some areas, plumbing code compliance may require a backflow prevention device, a dedicated shut-off valve, or installation by a licensed professional. Ignoring these rules can lead to failed inspections or home insurance issues down the line.
Let a Pro Handle It. While some advanced DIYers might be up to the challenge, most homeowners are better off hiring a licensed plumber who can complete the install quickly and correctly, protect your home from leaks or water damage, and ensure the system operates safely and to code. It’s a small investment for a big peace of mind.
Installing a hot water dispenser isn’t just about plugging in a tank—it involves precise plumbing work to ensure safe, leak-free operation. Here’s our step-by-step breakdown:
Our plumber begins by evaluating the space under the sink to ensure there’s room for the hot water tank and the necessary plumbing connections. The plumber also confirms the electrical outlet under the sink is properly grounded and rated for the dispenser.
The cold water supply valve under the sink is shut off to prevent leaks or spills during the installation process.
The plumber installs a T-valve or angle stop adapter on the cold water line to provide a dedicated feed for the hot water tank. A shut-off valve is often added for easy maintenance and emergency control.
If there’s no existing hole in the sink or countertop, the plumber drills a new hole (usually 1–1.5 inches) in a safe, accessible location. The faucet for the hot water dispenser is mounted securely and sealed with plumber’s putty or gasket to prevent moisture damage.
The plumber installs the tank on the cabinet wall or floor, following manufacturer clearance guidelines. The plumber then connects the cold water inlet, hot water outlet, and vent line (if applicable) to the tank and the dispenser faucet.
The tank is plugged into a GFCI outlet. Some models require specific amperage or dedicated circuits, which the plumber checks before powering on.
The plumber turns the water back on, checks for leaks at every connection, and fills the tank. Once filled, the tank is powered on and the heating cycle begins. The plumber tests the faucet for proper flow, pressure, and temperature.
All connections are double-checked for tightness and safety. The plumber provides the homeowner with usage tips and maintenance instructions.
Result: Instant Hot Water, No Stress. The result is a clean, professional install that delivers near-boiling water on demand, without risking leaks, damage, or electrical hazards.
We ensure quality service, offer guarantees, and provide ongoing support. Here’s what we do:
We provide a warranty on our workmanship. If there are installation errors or faulty work, it will be corrected.
We install reliable, energy-efficient plumbing components from reputable brands. We use manufacturer-approved parts to ensure longevity and performance.
We ensure the equipment is installed to the manufacture’s specifications, preserving the warranty.
We test the system post-installation to confirm proper operation. We then check for issues and seals before completing the job.
We provide customers a detailed invoice outlining the work performed, parts used, and warranty terms.
We encourage customers to enroll in our preventative maintenance plan for ongoing tune-ups and priority service.
We check in with customers after installation or repair to ensure satisfaction. We also offer 24/7 emergency support in case of urgent issues.
We stay up to date with state plumbing licensing through the Washington State Department of Labor & Industries and the Uniform Plumbing Code, and ongoing training.
By backing up our customers, we provide peace of mind and ensure long-term satisfaction with our work.
We’re a second-generation business with over 40 years of on-the-job experience. Our deep knowledge means we diagnose and solve problems faster, saving you time and money.
No hidden fees or surprise upcharges. The price we quote is the price you pay.
We offer warranties that protect your plumbing system —1 year on parts and 3 years on labor for new installations.
We go the extra mile to ensure no dings on your walls or scratches on your floors during repairs.
All our plumbers undergo criminal background checks and drug tests, so you can feel confident in who’s in your home.
We believe in offering pricing that reflects real value—ensuring you get the plumbing service you need without having to overpay.
Installing an InSinkErator hot water dispenser involves connecting the under-sink hot water tank to your cold water supply using a T-valve, drilling a hole in your sink or countertop for the faucet, mounting the tank securely, and connecting to a grounded GFCI electrical outlet. It’s a detailed process—Fast Plumbing and Drain offers professional, damage-free installation that ensures everything works safely and reliably.
A typical installation includes:
Shutting off the water supply
Tapping into the cold water line
Installing a dispenser faucet through your sink or countertop
Mounting the under-sink tank
Connecting plumbing and electricity
Because it involves cutting into pipes and drilling through surfaces, we recommend leaving it to a licensed plumber.
Some advanced DIYers may be able to install a unit, but risks include leaks, cabinet damage, and electrical hazards. You’ll need plumbing tools, electrical knowledge, and experience with countertop modifications. Fast Plumbing and Drain provides guaranteed, code-compliant installation that protects your investment and your kitchen.
Installation costs can range from $250 to $500+, depending on the complexity, location, and whether a hole must be drilled. Systems with built-in filtration or both hot and cold lines may cost more. Fast Plumbing and Drain offers upfront-price quotes—so there are no surprises.
Yes, especially if you’re not familiar with plumbing. These systems require cutting into water lines, installing valves, and handling hot pressurized tanks. Our licensed plumbers ensure everything is leak-free, safe, and up to local code.
Not if it’s installed by a pro. We take care to drill cleanly through countertops and mount tanks with proper clearance. We also seal around the faucet base to prevent moisture from damaging wood or composite materials.
Most hot water dispenser installations take 1.5 to 3 hours, depending on accessibility, plumbing setup, and whether any modifications are needed. Fast Plumbing and Drain completes the job efficiently—with full testing and clean-up.
Yes. Most hot water dispensers, especially InSinkErator models, require a standard GFCI-protected 120V outlet under the sink. If you don’t have one, we’ll assess your setup and recommend the safest solution.
Absolutely. As long as there’s access to a cold water line and a grounded electrical outlet, a hot water dispenser can be installed in a bathroom, wet bar, or butler’s pantry. We can evaluate the space and recommend the right unit.
Yes. Most modern instant hot water dispensers use less energy than a 40-watt bulb while in standby mode. They’re an efficient way to heat small amounts of water quickly without using your main water heater.
Let’s bring your vision to life with expert craftsmanship and thoughtful design.
16120 Woodinville Redmond Rd NE STE. 15
Woodinville, WA 98072
(425) 629-9564
hello@fastwaterheater.com
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