In most cases, knocking pipes are caused by variable water pressure in the main supply pipes coming into your home. However, when the air used in pressurizing those pipes leaks or is depleted, water moves suddenly and violently, creating the knocking sound as it traverses the length of the supply lines.

Why does my tankless water heater make a knocking noise?

Typically, your tankless water heater makes noise for one of five reasons, or a combination thereof. Those reasons include loose parts, restricted water flow, sediment buildup, water pressure fluctuations, or vibrations.

Why is my hot water tank making a noise?





As the water heats up, it bubbles up through the sediment deposits, sometimes breaking off the sediment and causing it to become loose in the tank. This popping or crackling sound you are hearing is the action of hot water forcing its way through the layers of sediment that has accumulated.

How long is the warranty on a Navien tankless water heater?

This 15 year limited warranty on heat exchangers, 5 year limited warranty on parts, and 1 year limited-labor warranty (“Warranty”) covers defects in materials or workmanship when the Navien NPN Water Heater (“Product”) is installed by a properly licensed plumber or contractor and operated in strict compliance with the …

How often should you flush a Navien tankless water heater?

Tankless water heaters should be flushed out every year to 2 years.

How much does it cost to flush a tankless water heater?

It costs around $150 to flush a tankless water heater. You especially need it at least annually if you have well water with a lot of iron. That causes more sediment buildup. The process takes about a half-hour.

Do I need to descale my tankless water heater?





Over time, a tankless water heater may accumulate mineral build up which can erode the walls inside your tank’s heating chamber. To properly maintain and clean your tankless water heater, it’s important to flush those mineral deposits at least once a year.

How long should I flush my tankless water heater?

Flushing your tankless heater is a simple task, but it does take 1-2 hours to complete. For most water quality, completing this task once a year will suffice, but if you have especially hard water you may want to complete more often.

How do you flush navien?

Quote from the video:
Then we turn the water off to the unit on the hot and the cold. So the first thing we're gonna do is take the cover off your navien unit which is just four screws two on the top two in the bottom.

How long should I run vinegar through my tankless water heater?

Quote from the video:
You want to do it between one hour to an hour and a half running it longer is not going to hurt.

Will vinegar harm a tankless water heater?



No. Vinegar will not damage a hot water heater. Under normal circumstances, the use of vinegar may not damage your water heater since it is made of stainless steel.

How do you descale a tankless water heater?

Quote from the video:
Position mix one quart of hercules haymaker tankless water descaler. And one gallon of water into a bucket connect one hose end to the pump. And the other end to the cold.

Is cleaning vinegar the same as white vinegar?

The difference between white vinegar and cleaning vinegar is the level of acidity. The majority of white vinegar has 5 percent acidity, whereas cleaning vinegar has 6 percent. One percent might not sound like much of a difference, but it actually makes the product 20 percent stronger.

What should you not clean with vinegar?



Eight things you really shouldn’t clean with vinegar

  1. Mirrors. Despite what you may see online, you shouldn’t use anything acidic, whether vinegar or lemon juice, to clean mirrors. …
  2. Steam irons. …
  3. Stone or granite kitchen countertops. …
  4. Dishwashers. …
  5. Washing machines. …
  6. Electronic screens. …
  7. Wood or stone flooring. …
  8. Knives.


Can I mix baking soda and vinegar for cleaning?

Adding vinegar and baking soda together creates a fizzy chemical reaction that can help dissolve stains and loosen up gunky messes. This makes them a handy cleaning combo, even though the actual solution left behind is basically salt water!

Which is stronger white vinegar or apple cider vinegar?

Distilled white vinegar is made by oxidizing grain alcohol (similar to vodka), which results in bacteria growth and acetic acid. It’s colorless, unlike ACV, and is relatively stronger than ACV as well.

Can I use distilled vinegar instead of apple cider vinegar?



Though your standard white vinegar is considered neutral in flavor, it is highly acidic and has a pronounced sharp bite. Use it as an equal swap for apple cider vinegar, but consider adding a splash of fruit juice or a pinch of sugar to balance out the flavor. On its own, distilled white vinegar can be a bit harsh.

What is synthetic vinegar?

This is SYNTHETIC VINEGAR. That means it is simply a mix of water and acetic acid, unlike real vinegar, which is made as bacteria break down sugars from fruits or grains into acetic acid.

Is distilled white vinegar the same as apple cider vinegar?

The most obvious difference between the two is their color. White vinegar, also sometimes called distilled or spirit vinegar, is clear and apple cider vinegar is brown. Standard white vinegar contains 4 percent to 7 percent acetic acid and 93 percent to 96 percent water.

What is the strongest vinegar?

Spirit vinegar



Spirit vinegar: The strongest of all vinegars, this is used almost exclusively for pickling. It differs from distilled vinegar in that it contains a small quantity of alcohol.

What vinegar is the healthiest?

Balsamic vinegar

Balsamic vinegar



This is one of the healthiest and most nutritious varieties of vinegar. Also, the antioxidants available in this vinegar are known to lower chances of heart disease and cancer.