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Submit search Home > Products > Motors Category > Parts & Accessories > RV, Trailer & Camper Parts > Exterior > Valterra T21301VP Horst Miracle Probes Blk Water Condition :New Price: $53.79 MPN : T21301VP UPC : 019079413017 Shipping From: Quantity in Stock:34 Order Now & Get it by: Qty: Description Valterra RV Water Tank 4 Pack Horst Miracle Probe Sludge IndicatorsSludge and soap residue build-up on the sides of RV black and gray water tanks can lead to false readings. The patented design of Horst Miracle Probes prevents false readings because they 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.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.Easy to install as they fit the 3/8" diameter holes of existing probesCompatible with existing wiring and monitors, so they can simply be connected to the new Related Items Adco Products 2890 Popup Trl Cover 8'Lx88"Wx42"H AP Products 013-691350 Fastec Repl Key 350 @5 Samlex America Ssp-150-Kit 150W Solar Panel Kit Adco Products 12253 Sfs Hilo Cover 22'7"-26' Gray Price: $95.38 Add to Cart Price: $13.16 Add to Cart Price: $449.39 Add to Cart Sale Price: $278.86 Add to Cart AP Products 013-691330 Fastec Repl Key 330 @5 Cofair Products UBE425 Quick Roof Extreme Wht 4Inx25' Kwikee Products 3747453 Single Kwikee/Lectro Step Blk AP Products 013-689337 Bauer Rv Repl Key 337 @5 Price: $13.16 Add to Cart Price: $53.36 Add to Cart Sale Price: $692.85 Add to Cart Price: $13.16 Add to Cart