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Old 10-26-2011, 06:13 AM   #11
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Location: Upperco, Maryland
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Horst Miracle Probes for Wastewater Tanks in Recreational Vehicles RVs

I have a set of these, won them at the Hershey RV Show but haven't had the time to install them. I believe Herk7769 has a step by step installation posted on here as well. These are highly recommended by Gary Bunser [The RV Doctor].


2007 Georgetown 370TS

Driver: Charlie
Navigator: Sheri
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Old 10-26-2011, 02:15 PM   #12
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Have been in the same club for years, but actually not so much. The grey are normally pretty accurate, the black never reads below 1/3 but above that is pretty accurate. We clean the grey tank (chemical through drain) about once a year. When the black start acting up I throw ice cubes in the toilet just before we pull out, by that evening travel I flush and then it is accurate back to the 1/3 reading. This has worked on all my rigs dating back to the 70's. I use the gages for when to dump.

JimF, CWO, US Army Ret, 100% DAV
2011 Georgetown 378TS
2008 Dodge Caliber Toad
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Old 10-26-2011, 02:34 PM   #13
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I am in the "RV-Digesst it" club!! IT works for us! Clean tank/no stink!
Dan, Kelly and Maddy.
Cupid and Kandi the Camp Dogs
Tomball, Texas
2006 Salem LE2013 Ford F150 Ecoboost Supercrew w/ factory tow package
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Old 10-26-2011, 04:34 PM   #14
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Anyone use a dipstick?
Lily the Yorkie
2015 Dodge Ram Sport 1500
2015 Crossroads Zinger ZT28BH
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Old 10-26-2011, 05:42 PM   #15
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If the toilet is straight into the black tank, you could just reach in with your arm...break up some of the solids while you're at it!


Nights camped in 2013 - 55, 2014 - 105, 2015 - 63
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Old 10-26-2011, 05:55 PM   #16
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I knew there was a reason wee only pee in our trailer !
number two is cg facilities .
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Old 10-26-2011, 07:25 PM   #17
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Ditto on the pee only, but the factory gauges still suck.
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Old 10-28-2011, 07:41 PM   #18
Tim & Lisa Trempert
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I had a Rockwood 8317ss travel trailer and now a Georgetown 350 and the sensors on both gray and black water worked fine. HOWEVER, I did have to learn a few things about them. First, I thought I was emptying the gray water all the way because the sound of water would stop after a while and I'd shut the valve. I could never get the gray water to read empty. I got a see-through connector and discovered that after about a minute all the air had been filled with water in the drain tube and the emptying process was silent, but water was still flowing. I now let it run until I SEE no more water and it reads empty every time.

In the travel trailer I would get readings above empty and I found if I flushed the system several times it would eventually read empty. With the Georgetown, it has the built in flushing system so I just flush it for a few minutes when I empty and get an empty reading every time.

Maybe I've just been very, very lucky.....
Tim & Lisa
2011 Georgetown 350
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Old 10-29-2011, 09:02 PM   #19
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Yeah, stock gauges crappy many alternatives in after market to include see-level system
2008 Georgetown 350TS
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Old 10-29-2011, 10:14 PM   #20
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Hey f1100turbo, he could just let his grey water drain on the ground. Oh please, I hope we can get that going again! That went 18 fun pages!

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