Grey Water Tank Indicator Constantly Reads 2/3 Full

jpi68
jpi68 Member Posts: 80
in Heating/Plumbing & Winterizing
We have a 2019 T@B 400. We have hooked our black/grey drain hose up to the dump station at our camp site and first opened the black water valve and drained it completely, shut that valve and then opened the grey water valve and drained it completely,,, However, returning to the cabin and checking the level indicators the grey tank still indicated 2/3 full... I ran the sink water for several minutes and repeated the grey water tank drain procedure... Still indicates 2/3 full.. Camper is level... Does anyone have an idea why 1. Either why our tank won’t drain, or 2, why the tank indicator is stuck on 2/3 full... ???
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Comments

  • Denny16
    Denny16 Member Posts: 5,431
    edited October 2020
    More likely the indicator is stuck.  Mine did this, and as the grey tank refilled, it started reading 1/3 tank.  These indicators are approximate readings at best, and are not very accurate.  They added some Happy Camper to the grey tank to help clean the sensor.
    cheers
    2018 TaB400 Custom Boondock,  Jeep Gladiator truck, Northern California Coast.
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  • Sharon_is_SAM
    Sharon_is_SAM Member Posts: 10,061
    @jpi68 -  put some diluted Calgon down the sink drain and refill the gray tank.  That may help unstick what’s stuck😊
    Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
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  • Blueespy
    Blueespy Member Posts: 274
    You can drive with some water in both the gray and black.  Add some detergent and/or Happy Camper and move on to your next site.  The sloshing will help clear any waste/paper/etc., from the sensors,

    Haven 220

    2026 Ford F1560 Tremor 5.0

    Niceville, Florida

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