Valterra Black Water Holding Tank Horst Miracle Probe Set

5+ In Stock
Item #
The Horst Miracle black tank probes have a specially designed “roof” over the probe sensor to prevent toilet paper from coming into contact with the probe and creating a false probe contact and related reading.
More Information
Condition New
Item # 90599
Brand Valterra
Model T21301VP
Fits 3/8" Diameter Holes
Features Compatibility with existing wiring and monitors, so they can simply be connected to the new probes.
Considerably longer than standard probes.
Surrounded by a Delrin body and Teflon tube which prevents any liquid residue or sludge from sticking.
Included 4 Probes
Net Weight 1
Special Order Item No
UPC 019079413017
WARNING: This product can expose you to chemicals, which is known to the State of California to cause cancer and reproductive harm. For more information, go to
Frequently Bought Together
Total price
Sludge and soap residue build-up on the sides of RV black and gray water tanks can lead to false readings. The sludge acts like a conductor between the positive content level sensors down the tank to the negative probe that is located at the bottom of the tank. This will trigger the indicator panel to show that there is liquid level in the tank even when there is none.

Horst Miracle Probes are considerably longer than standard probes and the sensor is surrounded by a Delrin body and teflon tube which prevents any liquid residue or sludge from setting up a conductive path.
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