If your RV tank monitor readings change from 25% to empty in the blink of an eye, that's a problem. This monitor uses SeeLeveL sensors (sold separately) for single-digit accuracy. Also features water heater and water pump switches. Great Prices for the best smart rv from SeeLeveL. SeeLeveL RV Holding Tank Monitor - Fresh, Gray, Black - Water Pump and Heater Switch part number SE74VR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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