When I get the tank what should I do first?
Sanitize each tank prior to use to remove any debris from the manufacturing process. When tanks are manufactured they do not have the holes for the fittings so holes are drilled and fittings installed, the tanks will have shavings from drilling the holes. We do not flush the tanks due to wanting tanks to be completely new and unused.

Tanks are made in a warehouse so maybe dusty or scuffed, this does not effect the use or safety of the tank, wipe with a damp cloth to remove surface dust or scuffs.

Class A Customs does not carry this chemical nor uses it in the manufacturing process

Tank & fittings made from DOW NSF International NSF/ANSI Std 61 approved Medium Density Polyethylene (MDPE) Resin

Can I put boiling water into the tank?
NO, boiling water is 212 °F (100 °C) NSF testing only goes to 180 +/- 4 °F (82 +/- 2 °C)

The tank smells like a candle?
Freshly made tanks may smell but it will disappear over time with exposure to air and water.

1. Prepare a chlorine solution using one gallon of water and a ¼ cup of household bleach (5% sodium hypochlorite solution)


Never mix bleach with ammonia or other cleaners.
Open windows and doors to get fresh air when you use bleach.

With tank empty, pour chlorine solution into tank. Use one gallon of solution for each 15 gallons of tank capacity.
2. Complete filling of tank with fresh water.
3. Allow to stand for three (3) hours
4. Drain and flush with potable fresh water.
Any residual chlorine odor will dissipate naturally.

I need a clean-out hole for my tank.
We do not offer clean-out ports at this time but there are many options online that allow you to install the needed clean-out port.

Example Dometic Universal Holding Tank Clean-out Kit - we do not sell this item

Someone accidentally put fuel into my water system, can I rinse it and just use it?
Class A Customs does not and can not recommend using a tank for fresh or drinking water after a contaminate such as fuel has been in the tank. You can not place gasoline, diesel or any other type of fuel into the Fresh Water tank and then use it for fresh or drinking water, you run the risk of contamination. If someone has accidentally placed fuel into your fresh or drinking water supply it is highly recommended that you replace the entire system, we understand this causes a financial strain to you and time down but the risk it simply too high to continue using the product after contamination. Replacing the entire system will ensure there are no possibilities of contamination from any areas that may have been exposed.

Can I use an old black water tank for fresh water if I clean it really good?
No, the health risks from using a previously used waste water tank for fresh or drinking water are extremely high and can not be recommended. Waste water tanks are also made from recycled materials and there is no guarantee if another material (paint / glue/ etc.) has been recycled along with the material, Waste Water Tanks are not for fresh or drinking water use.

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