Forum Discussion

pbitschura's avatar
pbitschura
Explorer
Jul 09, 2017

Suggest a better way to drain freshwater tank

My older "C" has no low point drain. For years I drained it by pumping the water with the grey valve open. Lately, I decided to pump it by leaving the water heater plug out. I got to wondering if there might be a easy mod that would drain the tank directly. I'm a little adverse to drilling holes in it as it is an older tank. I'm not sure about connecting a hose to the pump directly. Maybe a T and drain valve. Ideas please.
  • rk911's avatar
    rk911
    Explorer
    Jul 09, 2017
    pbitschura wrote:
    My older "C" has no low point drain. For years I drained it by pumping the water with the grey valve open. Lately, I decided to pump it by leaving the water heater plug out. I got to wondering if there might be a easy mod that would drain the tank directly. I'm a little adverse to drilling holes in it as it is an older tank. I'm not sure about connecting a hose to the pump directly. Maybe a T and drain valve. Ideas please.

    had the same problem on our '85 Winnebago Chieftain. never could find the low point drain despite Winny's claim that there was one. I did the same as you...pumped it through to the gray tank. a PITA but it worked.
  • GordonThree's avatar
    GordonThree
    Explorer
    Jul 09, 2017
    Put a fresh water dump valve inline before the pump, drilling a small hole through the floor for it.

    Leaving the HWT plug out sounds reasonable too.
  • jplante4's avatar
    jplante4
    Explorer II
    Jul 09, 2017
    GordonThree wrote:
    Put a fresh water dump valve inline before the pump, drilling a small hole through the floor for it.


    This, and if you route the hose off the valve correctly, you can use it as a pickup tube for the RV antifreeze when winterizing.
  • Pauljdav's avatar
    Pauljdav
    Explorer
    Jul 10, 2017
    The drains are very hard to find on these older units.
    I had one that the fresh drain was reachable by lifting the dinette bench. (This is where the fresh water tanks were) and reaching under the fridge. The low point drain was under the shower.

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