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  1. #11
    Setting Up Camp
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    Jun 2016
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    Yakima WA
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    Tom...

    Thanks for the help. Over the weekend, I tried the vacuum cleaner hose over the inlet .. for the Blackwater Flush. It WORKED!. I did it a couple of times, for a second or two and then inserted water into the inlet. All is fine.

    I have heard, that there was a sprinkler type mechanism inside the Blackwater tank that you could hear when inserting water. Although I heard water come into the Blackwater tank, I could not hear any 'sprinkler type' action inside.
    Dave & Becky
    2016 Reflection 303RLS
    2015 GMC Denali HD
    Yakima WA

    ENJOYING the GD Camper

  2. #12
    Fireside Member
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    Jan 2015
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    Soldotna, Alaska except winter
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    Quote Originally Posted by RangerDave View Post
    Tom...

    Thanks for the help. Over the weekend, I tried the vacuum cleaner hose over the inlet .. for the Blackwater Flush. It WORKED!. I did it a couple of times, for a second or two and then inserted water into the inlet. All is fine.

    I have heard, that there was a sprinkler type mechanism inside the Blackwater tank that you could hear when inserting water. Although I heard water come into the Blackwater tank, I could not hear any 'sprinkler type' action inside.
    Glad it opened for you. The sound I get is more like a spray hitting plastic tank walls. I hear a sound from the vacuum breaker valve and a separate sound of the spray in the tank.

    I also cycle the tank flush by turning it on until I get a good flow, then turn it off until the flow is almost gone. Then I flush again. The reason is that when I leave it on the discharge starts to appear clear like the tank has been thoroughly flushed. But, if I let it drain and reflush I get more waste debris. I assume that the tank fills a little faster than it drains which covers wate material and keeps the spray from hitting it directly.
    Tom and Tanya
    Live in Alaska, currently winter in Texas Hill Country.
    303RLS

  3. #13
    Left The Driveway Fridgeraider's Avatar
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    Jun 2020
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    Arkansas
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    So on a 2015 303 RLS how do I access the black take flush vacuum breaker? I believe mine is failed because when I use it I get external leakage near the water heater and sometimes water seeps from under the shower floor pan into the bathroom.
    Tim and Lezlie Arnold
    2015 Reflection 303RLS
    Tow vehicle 2017 Ford F-250 6.7 liter Diesel
    Andersen Ultimate 5th Wheel Hitch

  4. #14
    Left The Driveway Fridgeraider's Avatar
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    Jun 2020
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    Arkansas
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    2015 Reflection 303RLS black tank flush line vacuum breaker

    Click image for larger version. 

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    Tim and Lezlie Arnold
    2015 Reflection 303RLS
    Tow vehicle 2017 Ford F-250 6.7 liter Diesel
    Andersen Ultimate 5th Wheel Hitch

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