RV Toilet and the Geo Method

By , December 28, 2009 11:48 pm

RV water tanks (fresh, gray and black) are critical to the RV house system. The fresh water is self explanatory. The gray water is waste water from your sinks and shower. The black water is water from the toilet. The smell from the black water tank can be quite challenging and absolutely odorous (“I don’t want to go in the RV,  I’ll stay out here”), especially on a hot day. The goal for the black water tank is to have no blockage and no odor… And to keep it clean.

To address the smell from the black water tank, we have used various blue chemical solutions (that we have purchased from both Camping World and Walmart). During our visit in Sarasota, we met up with Jessica and Duncan from Traveling On the Skirts. We asked them what they do to treat the black water for their old fifth wheel. They clued us on the Geo Method for maintaining the gray and black water tank.

After some research, we decided we definitely want to try this method.

The Geo Method uses three basic household products:CalgonDetergent

  • Water softener (some recommend the non-precipitating type like Calgon, White Rain, Blue Raindrops, and Spring Rain)
  • Laundry detergent
  • Chlorine bleach (used infrequently compared to the other two ingredients)

Water softener helps remove the gunk from the tank and prevent it from sticking to the tank. Laundry detergent cleans the tank. Chlorine bleach is used to deodorize, sanitize and disinfect.

Water softener falls into two groups:

  • Precipitating (Arm and Hammer Washing Soda, Raindrops, Blue Dew, Borax, Climalene, Melo, White King Water Softener, and Borateem). This group is not recommended for the Geo Method as it does not work quite as well but you can use them if you cannot find the non-precipitating kind.
  • Non-Precipitating (Calgon, White Rain, Blue Raindrops, and Spring Rain). This group is recommended for the Geo Method.

The Geo Method is not necessary for every time you dump the tank. Once the tank has been “cleaned”, reduce the frequency as appropriate.

Regarding the toilet bowl, the Star manual specifically states:

 Do not use chlorine or caustic chemicals, such as laundry bleach or drain valve opening types, as they will damage the seals in the toilet and dump valves.

So, we will be foregoing the use of bleach in our implementation of the Geo Method for the black water tank. 

Thus far, we have emptied the black water tank and used the Geo Method (minus the bleach) three times. On the way from Sarasota back to Ocklawaha; the black tank had only water, detergent and water softener. It had a good sloshing on the way home.  

It’s still too early to judge its effect but we are hopeful…

Be Sociable, Share!

3 Responses to “RV Toilet and the Geo Method”

  1. Jessica says:

    From what I’ve read, the bleach is just to sanitize the system, not remove the particles that smell, so in theory, you should be able to omit the bleach. Perhaps there’s another disinfectant that wouldn’t hurt the seals? I dunno, there seemed to be a lot of debate about the Geo method, but from my personal experience it worked like a charm. 🙂

  2. […] used Geo Method to clean black water tank […]

  3. dianne says:

    I am new to rv’ing and am having problems with the smell–this sounds like it may work, but would you please give a little more detain–like how much to use and do up put it in right before you dump, as you dunp after you dump? Do you leave it end when you set up? It sounds like you maybe put it in right before travel? Any help would be appreciated.

Leave a Reply

Panorama Theme by Themocracy