How to install a tankless water heater. Step-by-step guide.
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- Опубликовано: 19 май 2023
- Hey Everyone! Check out this informative video where we guide you through the installation process of a tankless water heater inside a real customers home. We address various factors to consider when installing a tankless system, such as intake and exhaust piping, electrical power supply, drain line, water line, and gas line. we had to remove the old water heater to make room for the new tankless unit before we filmed this video. By opting for a tankless water heater, we not only reduce operating costs but also provide endless hot water for our customers’ home.
During this installation, we faced a unique challenge of having half the wall made of concrete and half made of wood. We measured and mounted the tankless water heater where we wanted it. To ensure proper installation, we secured the unit with brackets and made necessary connections. The cold water runs down from the ceiling, replacing the old hot water line, and enters the tankless unit through the cold inlet isolation valve. The unit utilizes 95% of the heat it generates to heat the water. The plastic flue piping is used to handle the condensation formed during the heating process, which is a sign of maximum efficiency.
We go over how we adapt the piping material to match the existing plumbing inside the house. If the house primarily uses copper or PEX piping, we try to maintain consistency. For aesthetic reasons, we prefer using white PEX piping. Inside the tankless unit, a complex system of parts work together to transform cold water into hot water. The temperature is set to 120 degrees Fahrenheit, ensuring a comfortable water supply to faucets and fixtures.
One of the connections made was the gas line. That connection was made using a negative pressure gas valve, allowing us to utilize half-inch gas piping instead of the typical three-quarter inch. A pressure relief valve ensures safety in case of excessive heat or pressure build-up. The condensation created by the high-efficiency unit is directed to a floor drain which was thankfully pretty close to where we were working. We took precautions by using zip ties instead of screws to secure brackets, preventing rust and damage over time and we think it just looks better
Next was the electrical power supply, we repurposed the furnace service switch into a switch-outlet combination, providing a good connection for the tankless water heater. We emphasize the importance of leaving a loop between the appliance and the outlet to prevent water from reaching the electrical components. Water and electricity don’t mix very well lol 😆!
So, Tankless water heaters have a sealed combustion system, where fresh air is drawn from outdoors and exhaust is pushed outside. The intake and exhaust pipes navigate through the basement, ensuring nice operation and increased overall efficiency of the home. We explain the installation of two-inch PVC piping and the addition of turn-down fittings to prevent rainwater from entering.
Throughout the video, you'll witness our expertise, problem-solving skills, and attention to detail. Join us on this installation journey as we navigate challenges, make necessary connections, and successfully install the tankless water heater. Stay tuned for more informative content and don't forget to like, comment, and subscribe! As well bring you plumbing videos in a way you’ve never seen before!
For more great info, check out our other videos on this channel or visit our webpage at www.CallSmedley.com
Good job guys!
Thanks!
Great video- thanks
Glad you enjoyed it
can i run the exhaust out the roof from the first floor and used inside house air as the intake
You can as long as the exhaust is sch40 PVC. You want to pull fresh air from outdoors if possible. It increases the overall efficiency of the home because all the air you pull from the home has to get replaced and then heated or cooled.
Here in the UK we can't have plastic piping within 1m of the gas boiler.. but we never have plastic on show anyways just for aesthetics.. plastic pipework is in the walls and floors and copper on show... we also use copper for our gad piping.. any threaded pipework is old old commercial heating pipework.
Yeah these are zero clearance units. So we can have plastic contacting the unit.
Ive got a few clients with tankless hot water units installed in 2 story houses. Ive had to get 5 gallon pre heat heaters installed . To get some hot water up to temp in those upstairs bathrooms.
Sounds like your taking about the wait for hot water to the upstairs bathrooms?
@@SmedleyPlumbing Yes the the ladies of the house were complaining on that wait. The other big question. Advantage , Disadvantage of either a High eff. 50 gal Gas WH or do I go Tankless. I get that a lot. Here its about a 1,000 dif in price.
I get the I like to take baths and I’m always having to add hot water to my tub. It runs out as I’m soaking… we have a 40 gal NG vented tank now….
I told my plumber he should just make a info sheet and hand it out or Email it to his quotes. Most want that piece of paper not a google search or website.
@@BZ1340 the wait time shouldn't be any different that a tank type heater. But recirculation pumps can be added to the link to reduce or eliminate the wait time.
Could you tie your intake and exhaust pipes to existing furnace intake and exhaust pipes? Or do they need their own?
They must have their own. Otherwise there exhaust from one could be forced into the other.
Do you not put neutralizers on the condensate for your navian tankless? I thought Navian recommended installing one.
They need one of they're going to a cast iron floor drain. But they're not needed on a plastic drain.
@@SmedleyPlumbing ok, our state code requires them on any tankless water heater condensate going to the sewer.
@@ARrebel here we just need to use them in the drain is not PVC
Does tankless need expansion tank?
Depends on in the unit is set up for a recirculation system or not. If so, then maybe. If not, then no.
UPC no PEX within 18” of the water heater.
UPC also states to install according to manufacturers specs. This install is in accordance with those specs. That rule is also intended more for gas water heaters to keep the PEX away from the single wall flue piping.
I thought when I came to a gas line, it was all about the pressure?
It usually is. Unless the unit is spec'd for reduced gas pipe sizing.