Forum Discussion

MPI_Mallard's avatar
MPI_Mallard
Explorer
Jun 26, 2017

Black/Grey tank by-pass

I have a 07' Cedar Creek Daydreamer with three separate waste tanks, two grey and one black and the one thing they all have in common is they all have those P.O.S. drainmaster electric valves (I wouldn't wish these on my worst enemy!!), as we basically go pin-to-pin every six months I realized I only need these tanks while in transit so why not fit a by-pass system to go straight down the sewer connection?

Anyone out there done this?? Thanks in advance!

Red Green: "Vegetarian" is an old Indian word meaning "I don't hunt so good."
  • colliehauler's avatar
    colliehauler
    Explorer III
    Jun 26, 2017
    TenOC wrote:
    Snowman9000 wrote:
    You can't do it on the black tank. All the solids will hit the empty tank bottom and pile up.


    I have been "parked" for 3 years now. I leave my drain lines open in the dump position all the time. No problem with "pile up". Be sure to use lots of water (with the solids) in the toilet.

    However, I can not suggest removing the dump valves. You never know when you may need to close the valve. They do make an add-on slide valve that could be added if one need to use the valve.
    My neighbor at the seasonal site said the very same thing about leaving the black tank drain open. Took a few years then he had one heck of a mess. Guess what on their new trailer they don't do that any more.
  • TenOC's avatar
    TenOC
    Nomad
    Jun 26, 2017
    Snowman9000 wrote:
    You can't do it on the black tank. All the solids will hit the empty tank bottom and pile up.


    I have been "parked" for 3 years now. I leave my drain lines open in the dump position all the time. No problem with "pile up". Be sure to use lots of water (with the solids) in the toilet.

    However, I can not suggest removing the dump valves. You never know when you may need to close the valve. They do make an add-on slide valve that could be added if one need to use the valve.
  • Sam_Spade's avatar
    Sam_Spade
    Explorer
    Jun 26, 2017
    CarnationSailor wrote:

    I think the OP wants to bypass the black tank and connect straight to the sewer. Nothing could pile up in the black tank if nothing goes into it.


    I don't think that is what he wants AT ALL.
    The solids would still accumulate in the HOSE.

    Unless maybe you positioned the toilet outlet perfectly above the sewer inlet pipe.
  • wildtoad's avatar
    wildtoad
    Explorer II
    Jun 26, 2017
    Not sure how you would bypass the output from the toilet going to the black tank on a temporary basis but if you figure it out, make sure your toilet will dispense enough water each time to move things all the way to the sewer lest you create a real mess.
  • korbe's avatar
    korbe
    Explorer
    Jun 26, 2017
    Keep in mind that a flush in your home toilet uses a lot more water than a flush from the standard RV toilet. There are reasons for that.
  • CarnationSailor's avatar
    CarnationSailor
    Nomad
    Jun 26, 2017
    Snowman9000 wrote:
    You can't do it on the black tank. All the solids will hit the empty tank bottom and pile up.


    I think the OP wants to bypass the black tank and connect straight to the sewer. Nothing could pile up in the black tank if nothing goes into it.
  • Sam_Spade's avatar
    Sam_Spade
    Explorer
    Jun 26, 2017
    Snowman9000 wrote:
    You can't do it on the black tank. All the solids will hit the empty tank bottom and pile up.


    And leaving ANY of the tanks open to the sewer connection all the time is NOT a good idea.......because gasses, odors and varmints can come back up the hose.

    Then.....what IS the problem with the electric valves ? And opening them to dump every few days ?? It IS OK to leave the hose connected, just don't leave the valves open.
  • Snowman9000's avatar
    Snowman9000
    Explorer
    Jun 26, 2017
    You can't do it on the black tank. All the solids will hit the empty tank bottom and pile up.

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