Get an accurate reading of waste levels in your RV's black-water tank. Extra-long sensors are surrounded by Teflon to prevent false probe contact and incorrect sensor readings. Fits 3/8" diameter holes. Connects to existing wiring. Great Prices for the best smart rv from Valterra. Horst Miracle Probe Sensors for RV Black Water Tanks - Qty 4 part number T21301VP can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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