Why are RV Water Tank Heaters Typically Only Used for Freshwater Tanks

Question

Question:

I’ve read some of your experts’ comments here saying water tank heaters are only needed for fresh not grey water. Please explain. I will be camping at 6000 feet next February and March in New Mexico. It typically gets into the 20’s at night and sometimes lower. I want to keep my tanks and lines from freezing and need some help to find the best option. TIA. Steve

asked by: Steve R

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Expert Reply:

With gray water tanks you can simply pour a couple quarts of RV antifreeze down the drain of a shower and toilet and you'll prevent them from freezing. Since you don't want to drink antifreeze that's why the heaters are typically only used on freshwater tanks.

expert reply by: Jameson C

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Answer 1

The only tank that actually requires a heating pad is the freshwater one because the other tanks you can simply pour RV antifreeze into and not have to worry about heating the tanks. That said if you wanted to you could install Thermaheat pads like…

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Answer 2

The good news is that you don't have to have heaters on black and gray water RV tanks. The fresh water needs a heater as you can't put any antifreeze in it. But since you don't have to worry about poisoning the water in the…

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Answer 3

I went out into our warehouse and grabbed a part #CAM40126 to take a couple pics of the install instructions for you to check out. I attached them to this page.

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Answer 4

The Quickie Flush RV holding tank rinser #CAM40123 provides a straight stream and does not spin. For one that does provide a 360 degree spray I recommend #CAM40126.

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Answer 5

The ThermaHeat RV Holding Tank Heater Pad w/ Thermostat #277-000163 is compatible with 12 volt DC power but can be used with a converter to adapt to AC power. This pad is designed to be used on holding tanks with capacities between 29 and 40…

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Answer 6

I would use a protractor, see photo, place the protractor on the edge of the inside of one side of the trailer frame and the other inside edge of the trailer frame should be parallel with the 50 degree line on the protractor. Another way to verify…

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Answer 7

I spoke with my contact at Therma Heat regarding the Heater Pad with Thermostat #277-000163 referenced in your question. She stated that it is perfectly safe to install an insulating blanket over the heating pad. Please note though, that in order…

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Answer 8

You can not "daisy chain" theThermaHeat RV Tank pad #277-000164, or ThermaHeat #277-000161 Elbow pads in series, but you can connect them all in parallel, so each pad essentially has a direct line to the battery. The operation of the…

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Answer 9

You could use more than one holding tank heater if you wanted to and there are different options available. Pad heater #277-000164 is one option. There is also another model, #277-000163, with different dimensions. We also have elbow heater pad…

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Answer 10

The ThermaHeat RV Holding Tank or Step Heater Pad w/ Thermostat #277-000163 that you referenced does radiate heat on both sides of the pad. When the ambient temperature drops below 45 degrees the heater comes on and won't go off until it has…

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Answer 11

For your application we have 2 different heater pad sizes: 25" Long x 7-1/4" Wide - #277-000163 18-1/4" Long x 12" Wide - #277-000164 These have built-in thermostats that turn on when the tank reaches 45 degrees F and then shut…

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Answer 12

To keep the valves of your black and gray water tanks you can use a smaller heating pad like the ThermaHeat RV Dump Valve Pipe and Elbow Heating Pad - 13" Long x 3" Wide #277-000161 or the ThermaHeat RV Dump Valve Pipe and Elbow Heating Pad…

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Why are RV Water Tank Heaters Typically Only Used for Freshwater Tanks

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