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Old 05-26-2019, 07:04 PM   #1
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Using TSP to clean holding tanks

Has anyone used TSP to clean the holding tanks, especially the black tank, to try to get the level sensors to work? If not, what has worked for you?
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Old 05-26-2019, 07:14 PM   #2
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This is the best thing I have found (25+years of Airstreaming)
https://sites.google.com/site/cbruni/

ps:
I do not include the chlorine bleach every time because in any concentration it is not so good for the rubber seals on the dump valves. Since I started using this method several years ago the inside of my black tank is back to its original white color and the sensors in the tanks read like new.
Getting the tank full enough to wet the sensors before dumping and then thoroughly rinsing after dumping to remove any debris are, IMO, two important steps.

Adding TSP to the mix would be helpful.
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Old 05-26-2019, 07:29 PM   #3
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Has anyone used TSP to clean the holding tanks, especially the black tank, to try to get the level sensors to work? If not, what has worked for you?
Thanks for the info. Definitely worth trying. My AS was nominally used over the years, so no telling how much "crud" has accumulated.
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Old 05-26-2019, 09:23 PM   #4
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I too can attest to the GEO method working for us. Our sensors on our new Classic started acting up after several months. After going on the GEO system, we have had no problems at all. It is cheaper than using bizarre chemicals and does not leave your trailer with a chemical smell.

Love it!
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Old 05-27-2019, 05:45 AM   #5
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Thank you for the link to the GEO article. I plan on sharing it with my AS group. I see AS's with their waste hoses hooked up, wide open and dumping for the entire weekend. I think all they are doing is making brown pyramids in their black tanks. As noted, full tanks produce good strong water flow which leaves a cleaner tank.
Ice in the tank is an urban legend. Utube has a nice video that shows a clear holding tank in the back of a pickup truck. It shows the ice just sloshing around but still, people, swear by it. If it helps at all, it's because they are finally getting enough water in the tank.
I'm in the first run of using the GEO method so I haven't seen an improvement of my sensor reading, yet. I expect once I've done it a couple of time, I'll be back to accurate readings.
I do agree to be cautious with the bleach part of the equation. Mainly because of the potential for damage to the rubber gaskets. Again, at the start of the season I cringe when I hear tell of pouring 3 or 4 cups of bleach into the water system and waste system to clean it out. Bleach in this concentration is just too caustic. I love this forum and science.
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Old 05-27-2019, 05:48 AM   #6
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[QUOTE=mbubbaca;2245491
I do agree to be cautious with the bleach part of the equation. Mainly because of the potential for damage to the rubber gaskets. Again, at the start of the season I cringe when I hear tell of pouring 3 or 4 cups of bleach into the water system and waste system to clean it out. Bleach in this concentration is just too caustic. I love this forum and science.[/QUOTE]

We seldom use the bleach in our black tank with this method. It works fine with just the Calgon and Tide liquid detergent.
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Old 05-27-2019, 09:41 AM   #7
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Great article!
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Old 05-27-2019, 10:11 AM   #8
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I was surprised to learn that the sensors are actually outside of the tanks on our ‘18 Classic and giving faulty readings. Replaced under warranty.
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Old 05-27-2019, 10:22 AM   #9
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Quote:
Originally Posted by turk123 View Post
I too can attest to the GEO method working for us. Our sensors on our new Classic started acting up after several months. After going on the GEO system, we have had no problems at all. It is cheaper than using bizarre chemicals and does not leave your trailer with a chemical smell.

Love it!
. We use the geo too. FWIW, I have never found the Calgon granular. The liquid ver is generally available at Wally's, tho on a recent coast to coast, the availability varied considerably store to store.


Plan ahead.
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Old 05-27-2019, 11:30 AM   #10
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While the chlorine bleach may be beneficial for cleaning the black tank, it's not great for septic systems so use caution if you're dumping into a septic system. It would be even more of an issue if an RV park was on a septic system, given the volume of dumps they would encounter.


Another consideration are anti-bacterial soaps (never knew this until I sold my house that had a septic system). The operator of the service that emptied the tank commented that I must have been using anti-bacterial soap. He told me anti-bacterial soaps are extremely bad for septic systems as they kill the bacteria in the tank that breaks down the waste, which makes complete sense.
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Old 05-27-2019, 11:42 AM   #11
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Thank you for posting the Geo method!
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Old 05-27-2019, 12:06 PM   #12
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Prior to heading out, we’ll add about 1/4 to a half tank of water to the black tank then drop in a couple dishwasher tabs (with spot free rinse!). When we get to out destination, we’ll dump and flush.

Works like a charm.
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Old 05-27-2019, 03:16 PM   #13
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Originally Posted by Jaxon View Post
Prior to heading out, we’ll add about 1/4 to a half tank of water to the black tank then drop in a couple dishwasher tabs (with spot free rinse!). When we get to out destination, we’ll dump and flush.

Works like a charm.

Jaxon, after we switched DW tabs awhile ago at home and after seeing what they did to the bottom of the copper RevereWare...hmmm, maybe for occasional use in the RV.
Thx for the post.
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Old 05-27-2019, 06:16 PM   #14
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Quote:
Originally Posted by Jaxon View Post
Prior to heading out, we’ll add about 1/4 to a half tank of water to the black tank then drop in a couple dishwasher tabs (with spot free rinse!). When we get to out destination, we’ll dump and flush.

Works like a charm.
I also add about ~5 gallons of water to the black tank before traveling. The water splashing around in the tank does do a good job of cleaning the sides of the tank. The laundry soap/water softener used in the GEO method works great with this. When I do not have laundry soap, I have substituted liquid dish washing detergent, Dawn or similar. I've also thrown in laundry detergent pods, liquid and/or powder. Any soap helps.

I leave this in the tank until the tank is full, then dump and flush. No need to waste it.
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