A hot water dispenser is a great way to get hot water quickly without having to heat it through the hot water heater. The hot water dispenser is installed under a sink and attached to the cold water supply. The hot water is fed through another faucet that is mounted on the side. All electrical components and copper piping is under the sink near the wall. Replacing a hot water dispenser is a moderately challenging job. This project requires both plumbing and electrical knowledge, tools, and skills. However, a do it yourself homeowner can replace the hot water dispenser with the right steps.
Step 1 - Turn off Water
Before you remove any of the water pipes for the hot water dispenser it is recommended that you shut off the water supply. There should be a shut off valve in the cold water supply line before the dispenser.
Step 2 - Drain Pipes
With the water off it is a good time to drain the pipes from the dispenser to the faucet. Turn the faucet to the on position until the water stops dripping.
Step 3 - Turn off Power
If the hot water dispenser is hard wire into the electrical system then you should turn the power off to disconnect the wiring. Most hot water dispensers are plugged into a GFCI outlet so that should not be a worry. If it is plugged in, then pull the plug and set in on the cabinet floor.
Step 4 - Disconnect Water Lines
The water lines should be connected with braided soft copper lines. They are very easy to work with and only require a wrench to loosen the retaining nut. Even if the pipes are hard copper the retaining nuts will only need to be twisted off. You should not have to cut into any of the pipes.
Step 5 - Disconnect from Mounting Bracket
The hot water dispenser is mounted to the wall under the sink with a mounting bracket. There should be 3 to 4 bolts that hold the dispenser to the bracket. Remove these bolts with a screwdriver or wrench. Once the dispenser is free from the backet you can lower it down to the cabinet floor.
Step 6 - Replace Dispenser
Take one last look around the dispenser to make sure that everything is disconnected. If so, then remove the old hot water dispenser. Set the new one in place.
Step 7 - Connect Hot Water Dispenser to Bracket
Hold the hot water dispenser up to the bracket and guide the securing bolts in through the holes. Tighten them with a screwdriver of a wrench.
Step 8 - Make All Connections
In the reverse order that you removed the water supply lines, connect them to the new hot water dispenser. Use some Teflon tape on the threads to make sure there are no leaks. Tighten the retaining nuts with pliers.
Step 9 - Plug in New Hot Water Dispenser
With the lines all connected you can plug in the new hot water dispenser. Turn on the water and make sure there are not leaks. Test out the hot water dispenser and set it to the right temperature.