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Black tank

crowsnest
crowsnest Member Posts: 50
in Heating/Plumbing & Winterizing
Hi. Does the black tank only fill from the toilet or does it include bathroom sink and/or shower?
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  • Bayliss
    Bayliss Member Posts: 1,496
    @crowsnest, only from the toilet.
    2019 T@B 320 S Boondock Lite; 2025 Toyota Tundra CrewMax 4x4
    (Alde: 3020; Refrig: Isotherm Cruise 65 Eleg; Battery: BB 100Ah LiFePO4; Solar: Renogy 220W Portable Suitcase w/ Victron SmartSolar MPPT 75/15 Controller; Victron BMV-712 Battery Monitor w/ Shunt; Pwr Cntr: PD-4135KW2B; EMS: PI-HW30C)
    Greg & Marlene (Tucson, AZ)


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  • crowsnest
    crowsnest Member Posts: 50
     :) 
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  • crowsnest
    crowsnest Member Posts: 50
    With full hookups should I leave the black tank drain closed until it’s close to full so that the enzyme treatment can work? It seems that if it’s left open “stuff” will just sit there until there’s enough liquid to help it drain. 
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  • Slackers
    Slackers Member Posts: 491
    The water from several flushes will soften all the shtuff in it and make emptying the tank flow so much better.
    2019 Tab 320 CSS, 2019 Ranger TV, OH
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  • VictoriaP
    VictoriaP Member Posts: 1,496
    Never leave the black tank valve open while hooked up. That’s how you end up with the dreaded poop pyramid directly beneath the toilet. Open that valve only when you’ve got a decent mix of liquids with your solids, preferably around 2/3 full, and when you have plenty of water to flush the tank out after dumping.

    You do NOT want to deal with the mess that can occur from not having enough liquid to push things along. Anyone who’s dealt with a poorly maintained black tank in a used RV can attest.
    2019 320s BD Lite, white with blue (“Haven”)
    2015 Subaru Outback 3.6r (unsafe 200lb tongue weight limit until 2020 models)
    2020 Subaru Outback XT
    Pacific NW
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  • Marceline
    Marceline Member Posts: 1,745
    crowsnest said:
    Hi. Does the black tank only fill from the toilet or does it include bathroom sink and/or shower?
    Most T@Bs have a separate black and gray tank, but the early Pleasant Valley T@Bs (2012-2014?) have a single combined tank. 
    San Francisco Bay Area
    2013 CS-S us@gi
    2015 Toyota Tacoma PreRunner Double Cab
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  • Sharon_is_SAM
    Sharon_is_SAM Member Posts: 10,061
    Didn’t know that @Marceline.
    Sharon / 2017 T@B CSS / 2015 Toyota Sienna Minivan / Westlake, Ohio
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  • Bayliss
    Bayliss Member Posts: 1,496
    Either did I, @Marceline.  Thanks for sharing that tidbit of information.
    2019 T@B 320 S Boondock Lite; 2025 Toyota Tundra CrewMax 4x4
    (Alde: 3020; Refrig: Isotherm Cruise 65 Eleg; Battery: BB 100Ah LiFePO4; Solar: Renogy 220W Portable Suitcase w/ Victron SmartSolar MPPT 75/15 Controller; Victron BMV-712 Battery Monitor w/ Shunt; Pwr Cntr: PD-4135KW2B; EMS: PI-HW30C)
    Greg & Marlene (Tucson, AZ)


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