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 plumbing help

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Dgaviolac

  • Total Posts: 64
  • Joined: 1/23/2013
  • Location: Hamptons, NY
plumbing help Sat, 02/23/13 12:32 PM (permalink)
I just received my new 35 gallon horiontal fresh water tank but am still waiting tobuy my 40 gallon grey water tank. Question is what size should I do it all in? Also when looking for a grey tank how many holes should be in the top do I need a vent directley from the tank?where do I need check valves on both sides or just a diagram would be great thanks.
 
#1
    a.mckenna

    • Total Posts: 53
    • Joined: 2/13/2013
    • Location: Seattle, WA
    Re:plumbing help Sat, 02/23/13 8:30 PM (permalink)
    I do all fresh water in 1/2" PEX, the Sharkbite system of parts are super expensive but very idiot proof. I use the crimp fittings as they are cheaper, but you gotta buy the crimp tool. PEX is the best in my opinion for fresh water, easy to assemble, lasts forever, the pipe itself expands and contracts during temperature fluctuations, doesn't crack if it freezes. They make a 1/2" male threaded piece that fits in most RV water tanks, though some are 3/8" and you will have to buy parts to adapt it over to 1/2". Fill line I use 1" PVC.
     
    Grey water is all 1 1/2" ABS for me. 1 1/2" to 1 1/4" Fernco to adapt it to the stem on the RV tanks. All I use are fresh water style tanks, not the black ABS. I get all my tanks for a scrapper who pulls apart a large number of RV's and travel trailers, thus I get tanks for like 20 a piece. Found it best to use fresh water tanks as they are always clean and come in standard rectangular sizes.
     
    I drill a hole in the tank for the ABS to enter for the drain, before it enters I put a vertical vent. Most codes allow that, a few want it vented to the outside.
     
    Go Youtube PEX crimp fitting, pretty sure you will find a few videos on it. Really easy to figure out, and cheap.
     
    That make any sense?
     
    #2
      daddywoofdawg

      • Total Posts: 299
      • Joined: 2/23/2011
      • Location: Starkweather, ND
      Re:plumbing help Sat, 02/23/13 9:50 PM (permalink)
      I had all my pex for the sink made at a local plumbing shop as I didn't want to by the tool.
      I used fda approved hose for my tank fill fitted to a threaded barbed hose fitting.
      I use pvc to drain into my greywater tank.
       
      #3
        a.mckenna

        • Total Posts: 53
        • Joined: 2/13/2013
        • Location: Seattle, WA
        Re:plumbing help Sun, 02/24/13 12:14 AM (permalink)
        daddywoofdawg


        I had all my pex for the sink made at a local plumbing shop as I didn't want to by the tool.
        I used fda approved hose for my tank fill fitted to a threaded barbed hose fitting.
        I use pvc to drain into my greywater tank.

         
        *Note:
        If you buy PEX pipe and use the Sharkbite fitting system you don't need a special tool, the pipe just snaps into the fitting. Fittings come in every shape and size and can be bought at Home Depot.
         
        #4
          williamblakly

          • Total Posts: 1
          • Joined: 7/9/2013
          • Location: Perth, XX
          Re:plumbing help Tue, 07/9/13 4:42 AM (permalink)
          I think, these pipes have small holes along the sides. For more information visit:  hiltonplumbing.com.au
          <message edited by williamblakly on Tue, 07/9/13 4:44 AM>
           
          #5
            roadkillgrill

            • Total Posts: 174
            • Joined: 8/1/2009
            • Location: Helena, AR
            Re:plumbing help Tue, 07/9/13 8:13 AM (permalink)
            a 35g hw tank and a 40g gray water probably wont get you approved. You need a min of a 30g fresh water tank, thus a 30g fresh water + 35g hw tank = 65g. Thus you're required to install a 82g+ gray water tank for HD approval (125% of fresh water). This is why we search for the smallest hw tank we can find.  Yes there are exceptions, ie. coke machine connected to water supply.
             
            #6
              kennyb

              • Total Posts: 374
              • Joined: 1/19/2009
              • Location: paola, KS
              Re:plumbing help Tue, 07/9/13 8:53 AM (permalink)
              grey water only needs to be 15% bigger here
               
              #7
                roadkillgrill

                • Total Posts: 174
                • Joined: 8/1/2009
                • Location: Helena, AR
                Re:plumbing help Tue, 07/9/13 11:01 AM (permalink)
                I couldn't remember exactly, its been so long ago. Its hell getting old.. lol
                 
                #8
                  Dgaviolac

                  • Total Posts: 64
                  • Joined: 1/23/2013
                  • Location: Hamptons, NY
                  Re:plumbing help Tue, 07/9/13 5:02 PM (permalink)
                  when I turn on my pump water shoots out the it water inlet is there supposed to be a check valve somewhere?
                   
                  #9
                    SantacruzTacoCo

                    • Total Posts: 78
                    • Joined: 9/6/2012
                    • Location: Honolulu, HI
                    Re:plumbing help Wed, 07/10/13 2:42 PM (permalink)
                    Awww maaan!  I wish I would've researched the Sarkbite system, I just did my plumbing and it was a bit of a pain, now I want to rip it out and install the PEX since it looks like it can also be disassembled on the fly in case of leaks or failure
                     
                    #10
                      Kentuckys finest

                      • Total Posts: 3
                      • Joined: 11/3/2011
                      • Location: Bowling Green, KY
                      Re:plumbing help Sat, 07/13/13 2:24 PM (permalink)
                      I used this to prevent backflow. Don't know how you have it plumbed out, hope this helps.
                      amazon.com Camco 23303 RV 1-2 Back-Flow Preventer Automotive
                       
                      #11
                        pigrig

                        • Total Posts: 9
                        • Joined: 7/28/2013
                        • Location: cozumel, XX
                        Re:plumbing help Wed, 07/31/13 12:07 AM (permalink)
                        They actually cut all the PEX at HD, made connections and fittings,  and you walked out after buying a completely done piping system? YOU ARE THE MAN!!!
                        daddywoofdawg


                        did you use the yellow Gas pex as well? thicker walls and no joints from tanks to regulator/ burner sound like the way to do it.
                        Zach

                        'I had all my pex for the sink made at a local plumbing shop as I didn't want to by the tool.
                        I used fda approved hose for my tank fill fitted to a threaded barbed hose fitting.
                        I use pvc to drain into my greywater tank. ''


                         
                        #12
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