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Fresh water and grey water tank question

June 22, 2010, 04:54:44 pm

My husband and I just recently bought an 89 Gran Villa and are brand new to rving. We are about ready to take it out on the road. Today when we were sanitizing the tanks my husband noticed on the monitor that the fresh and grey tanks were filling up at the same rate.  I thought the grey tank was for waste water from the drains. Is there a valve or switch we need to turn in order for the grey tank to not fill?

Any help is greatly appreciated.
Thanks,
Bryan and Beth

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Re: Fresh water and grey water tank question

Reply #1 – June 22, 2010, 04:59:21 pm

Make sure you have all the faucets shut. They should not be joined other than through the drains that drain into it...  but I would also check and see if you filling the backflush line.. That is the way it could enter the tank.

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Re: Fresh water and grey water tank question

Reply #2 – June 22, 2010, 05:11:50 pm

Thanks John that's what I thought.  What is a backflush line?

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Re: Fresh water and grey water tank question

Reply #3 – June 22, 2010, 05:44:48 pm

The backflush is exactly what it sounds like. It enables you to wash the inside of a holding tank and flush it out. Do you have multiple connections in the water compartment bay. If you can not figure it out, post a picture of the bay and someone will have owned it or will figure it out.  ALso do you have a hose on a reel under there. If so that is what you use to fill the water tank and any other connection is a backflush connection..

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