How to get rid of smell in RV fresh water tank?

Author: Garland Rice MD  |  Last update: Wednesday, August 27, 2025

Attach a flushing wand to increase the water pressure and direct it into the deeper parts of the water heater tank. Next, pour the hydrogen peroxide or vinegar into the water heater tank and let it sit for a few hours or overnight. This allows the solution to neutralize the bacteria and eliminate the odor.

How do I get the smell out of my RV fresh water tank?

Use hydrogen peroxide about 1 pt to 10 gal water into an empty fresh water tank. Run the pump until all faucets have the treated water coming out. Very effective on smelly water. Since the hydrogen peroxide dissipates on its own, just go ahead and fill the tank and use it.

How do you fix a smelly rainwater tank?

Install a mesh screen or a first flush diverter to prevent leaves and debris from entering the tank. Ensure there is proper ventilation to allow air circulation and discourage the growth of anaerobic bacteria. Regularly inspect and clean the tank, ideally at least once a year or more frequently if necessary.

Why does my freshwater tank smell so bad?

The smell you have comes from bacteria living and dying in your tank. They leave behind a byproduct called Hydrogen Sulfide (rotten egg smell). If you have this smell chances are very good that there is a biofilm (Slime) formed on internal surfaces and hoses/tubes.

How do I keep my RV smelling fresh?

RV deodorizing pro tips
  • Add water softener powder to a bit of water in your black tank after you empty it.
  • Fresh-smelling liquid laundry detergent; Add this to your emptied black tank.
  • Ice chips.
  • Make sure you store your dirty laundry in air-tight containers.

STINKY FRESH WATER IN YOUR RV?

Why does my water smell bad in my RV?

The rotten egg smell in your camper's water system is typically caused by anaerobic bacteria reacting with magnesium or aluminum anode rods, resulting in the release of hydrogen sulfide gas.

How do I keep my RV fresh water clean?

How to Sanitize Your RV Fresh Water Tank in 5 Simple Steps
  1. Step 1: Turn Off Your Water Heater. ...
  2. Step 2: Drain Your RV Fresh Water Tank and Hot Water Tank. ...
  3. Step 3: Add Bleach Mixture to Your Tank and Fill It Up. ...
  4. Step 4: Run Chlorinated Water Through Your System and Let It Sit.

How do you deodorize a water tank?

You can try flushing the tank to remove sediment and bacteria buildup. Additionally, installing a water heater anode rod or using chlorine treatment can help eliminate odors and maintain a fresh hot water supply.

How can I make my tank smell better?

Carbon is by far the most popular and effective way to keep your aquarium smelling fresh. Activated carbon has a higher surface area than normal carbon so can adsorb smells even more effectively. Carbon can be effective on all of the above smells and will also provide crystal clear water.

What can I put in my black water tank for smell?

Use Fabric Softener

This is a nifty little hack for RV owners. If you want to eliminate black tank odors and freshen the atmosphere of your RV, take a capful or two of scented fabric softener and pour it into your black tank.

How do you neutralize smelly water?

Chlorination can kill sulfur bacteria. If all bacteria are not destroyed by chlorination, the problem may return within a few weeks. Increase the water heater temperature to 160 degrees Fahrenheit (71 degrees Celsius) for several hours. This will destroy the sulfur bacteria.

Can you put bleach in rainwater tank?

However, for these products to be effective, some filtration of particulate matter may be required. Some common chlorine products that can be used in water storage tanks: • four per cent liquid bleach; • 12.5 per cent liquid sodium hypochlorite; • 65 per cent granular or powdered calcium hypochlorite.

How to disinfect a rainwater tank?

To maintain a safe water supply after the initial dosage, 1 gram of calcium hypochlorite or 4 millilitres of sodium hypochlorite per 1000 litres should be added to the rainwater tank and allowed to stand for a minimum of two hours. The water will be safe to drink provided the chlorine smell is not too strong.

Why does my RV tank smell so bad?

Tank waste buildup and poor ventilation are the primary reasons for that awful black tank smell coming out of your toilet. Cleaning your tank, upgrading to a Siphon Vent and adding odor fighting additives to your tank should fix the problem.

Should I put bleach in my RV fresh water tank?

While your system is draining, calculate how much bleach to sanitize your RV water tank. You'll need about 1/4 cup of bleach for every 16 gallons of water your fresh water tank holds. Another helpful ratio is to use one ounce of bleach for every eight gallons of fresh water.

How do you make a homemade RV tank deodorizer?

Rather than buy nasty and expensive chemicals for the waste tanks try using a 1/2 cup of good old Borax laundry detergent and 1/4 cup of water softener. The Borax detergent helps control odor and cleans the tank.

What should a freshwater tank smell like?

Although many aquarium owners complain about an odor coming from their tank, a well-maintained aquarium should not have a noticeable smell. If you do catch a fishy whiff coming from the water, it means there might be something more going on. Aquatic Experts is here to help you diagnose the problem!

How do I stop my GREY water tank from smelling?

Grey water that is left sitting in your tank over time will likely start to develop odors and deposits. Use a grey water treatment product. Grey Water Fresh Concentrated to kill bacteria and remove odors from your grey water. Clean Drains Frequently.

Why does my tank water smell so bad?

Insufficient filter maintenance or adding unnecessary chemicals are two main reasons why you could have an odor.

Can I use vinegar to sanitize my RV water tank?

Fill your fresh water tank with at least 15 gallons of a 50/50 solution of water and white vinegar. Open your kitchen faucet and run your water pump until water comes out and you smell vinegar. Turn the water off and turn on the water heater. It will take at least 20 minutes for the water to reach at least 130 degrees.

Can I put fabric softener in my RV black tank?

Use two cups of softener for each wastewater tank in your RV. The tank's drain valve should be closed otherwise the softened water will just drain out. Then use the tank(s) normally until it is full and drain it normally. Add a cup of laundry detergent to the black (commode) water tank at the same time.

What to use to clean a fresh water tank in RV?

To create your tank sanitizing solution, you will need about ¼ cup of bleach for every 15 gallons of water your fresh water tank holds (so about ½ cup for a 30-gallon tank). Calculate how much bleach you need and add that amount to about a gallon of water. Using your funnel, add the mixture to your freshwater tank.

How long can fresh water stay in an RV tank?

The general rule of thumb is that water will stay fresh in the tank for about two weeks if you aren't refilling it regularly. If you use it regularly, thereby resupplying it daily, you should be fine. Freshness and safety become an issue when you have stopped using the RV, and it sits for an extended period.

How much baking soda do I put in my RV fresh water tank?

RV water tanks can be deodorized by flushing a solution of one cup baking soda mixed with one gallon of warm water. Sprinkling a little baking soda inside sneakers between uses will help prevent smelly shoes stinking up your RV.

How to sanitize a RV fresh water hose?

Make a sanitizing solution of 1.5 - 2 teaspoons of bleach in 2.5 gallons of water. Refer to manufacturer's directions. 3. Pour the sanitizing solution into the hose until it fills up the entire hose.

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