Quote:
Originally Posted by Josh2129
I think it is accomplished by adding a twist on RV waste valve in between your sewer valve connection and sewer hose. Costs around $25. I googled combine black and grey tank RV and got several YouTube videos. I have seen one by gonewiththewynns.
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That twist on valve allows one to equalize waste tanks......move water from higher level tank to a tank with a lower level.
Close the twist on valve and then open other waste tank drains....liquids will then equalize (find their common level) between the tanks.
I have a common drain header on my 5th wheel. I installed another drain valve on that common header (twist on hangs to low , adds extra unsupported weight to end of drain line and couldn't be left on when in transit).
With the extra drain valve I can tie the two grey tanks (grey/galley) together cause galley fills FAST.
I can tie grey/black or galley/black together or I can tie all three together for combined total of 128 gallons of waste water capacity.
Now folks will get all upset.......black and grey tied together.....OH the Horror!
Rvs use to have only ONE waste tank.
Waste is waste......grey stinks worst than black
Drain when FULL...whoosh affect and stuff gets carried out
They are WASTE tanks.....get dirty next time used.
I have done this 'mod' on last 3 trailers. Great for boondocking as you have control over waste water capacities
Twist on........