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  1. #1
    Seasoned Camper
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    Aug 2019
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    Indiana
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    Combined 2 drain dumps into 1

    I watched a All About RVs YouTube post https://www.youtube.com/watch?v=BVPs8YGXKi4&t=296s and got inspired to combine my rear gray water discharge with the front gray and black. Tried out yesterday and works great. Also lets me combine both gray tanks by shutting the T-80 Valterra dump valve and opening both gray tank valves. I just need to do some foaming and it will be complete. I did have to reorient my fresh water valve (handle pointing to the rear)and remove my factory black hose container tube to make room for the 1 1/2" pipe. Next Mod is adding 5" fence post for black hose. I came off the rear gray water tank with a "T" thinking I would leave the rear drain attached if needed for some reason but it extended to low and I was afraid of it contacting the ground in extremes towing circumstances. I just used an expandable plug which will allow clean out if needed. Here is the list of items I used. Sorry for the the picture orientation, I couldn't get them rotated.

    Valterra T-80 https://www.ebay.com/itm/Valterra-3-...53.m2749.l2648
    Slip Flange https://www.etrailer.com/RV-Sewer-Ho...BoCExAQAvD_BwE
    20ft of 1 1/2" ABS pipe
    (1) 3" x 1 1/2" "T"
    Several 90s
    Pipe Hangers https://www.menards.com/main/electri...4430913904.htm
    Attached Thumbnails Attached Thumbnails Drain 1.jpg   Drain 2.jpg   Drain 3.jpg   Drain 4.jpg   Drain 5.jpg  

    Tim
    2020 Reflection 320MKS, Sidewinder Hitch
    2003 2500HD Silverado Duramax, Sumo springs, Hawk Brake Pads

  2. #2
    New Member
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    Can you post some pictures or possible? Email them?

    Iím really interesting in doing this. Just not very handy


    Quote Originally Posted by Indy Tim View Post
    I watched a All About RVs YouTube post https://www.youtube.com/watch?v=BVPs8YGXKi4&t=296s and got inspired to combine my rear gray water discharge with the front gray and black. Tried out yesterday and works great. Also lets me combine both gray tanks by shutting the T-80 Valterra dump valve and opening both gray tank valves. I just need to do some foaming and it will be complete. I did have to reorient my fresh water valve (handle pointing to the rear)and remove my factory black hose container tube to make room for the 1 1/2" pipe. Next Mod is adding 5" fence post for black hose. I came off the rear gray water tank with a "T" thinking I would leave the rear drain attached if needed for some reason but it extended to low and I was afraid of it contacting the ground in extremes towing circumstances. I just used an expandable plug which will allow clean out if needed. Here is the list of items I used. Sorry for the the picture orientation, I couldn't get them rotated.

    Valterra T-80 https://www.ebay.com/itm/Valterra-3-...53.m2749.l2648
    Slip Flange https://www.etrailer.com/RV-Sewer-Ho...BoCExAQAvD_BwE
    20ft of 1 1/2" ABS pipe
    (1) 3" x 1 1/2" "T"
    Several 90s
    Pipe Hangers https://www.menards.com/main/electri...4430913904.htm

  3. #3
    Seasoned Camper
    Join Date
    Aug 2019
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    Indiana
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    Quote Originally Posted by John Mcgee View Post
    I’m really interesting in doing this. Just not very handy
    That is what I've done in this post.
    Tim
    2020 Reflection 320MKS, Sidewinder Hitch
    2003 2500HD Silverado Duramax, Sumo springs, Hawk Brake Pads

  4. #4
    Seasoned Camper EddieK82's Avatar
    Join Date
    Jan 2020
    Location
    South Jersey
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    What piece did you use that came out of the bottom with the cleanout? It has the red cap? I'm going to do this to my 320MKS next month.
    Ed & Kaitlin
    2021 Grand Design Reflection 320MKS
    2018 F350 SD Platinum FX4 Crew Cab Short Bed SRW, 55 Gallon Titan Tank, Air Lift 5000.

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