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I want to install a overflow from my gray to the black tank. The tanks are plastic. All of the fittings I have found you have to have access to the back side of the fittings. How can I get fittings that the female end of a hose would attach to into the tanks so they don't leek or fall out. Any ideas?

     Bob;   Mine are connected through the plumbing. I can open the dump valves from tank to tank without opening the last valve to the dump hose. Gravity will even the tank levels. Sofar..Sogood No problems...Cable

Quote from: fe2_o3 on January 22, 2010, 11:36:59 AM
     Bob;   Mine are connected through the plumbing. I can open the dump valves from tank to tank without opening the last valve to the dump hose. Gravity will even the tank levels. Sofar..Sogood No problems...Cable

would getting shet in the gray tank be a problem?

   Nope. Open the valve and the fuller grey water pushes its way into the black tank. Close the valve before or when the two levels are equal. Yes, you have to pay attention....Cable

We only dump gray water with the black so it will not make any difference.

  So, Bob; Does that mean you can dump from one tank to the other with out dumping to the hose?...Cable

When the gray water tank gets full I would like the the gray water to flow into the black tank. The gray water always fills up faster than the black. I just would like to extend the time between dumping.