What is a galley holding tank?

no info generic answer ---owners manual ---manufacturer --rv dealer ---rv service center

Fresh water drains should go directly onto the ground, not into another tank. I'd think a previous owner made the modification you describe. I'd correct it and allow fresh water tank drain go onto the ground.

I don't know what you will use, but when I am dry camping, my combined black and grey water tanks hold twice the fresh water tank capacity. SO: .... to fill it, I got a NEW 5 gallon yellow (diesel) plastic fuel tank('can') ..... (caution: do not put fuel into it), and used a drill pump (available for less than $8.00 from Harbor Freight) to pump fresh water from the 5 gallon 'can' into the fresh tank. repeat until filled. Since we live fulltime in a 5th wheel, I have my tools with me all the time.

buying a new, unused fuel container (5 gallon) , ensures no fuel contamination of your fresh water supply and tank. ALSO: get a NEW drill pump and do NOT use it for waste water or other fluids, keep in a small container for fresh water use ONLY..... recommend you let it dry thoroughly after each use.

Contact your local retailer directly or online here: Contact Winnebago Industries Call Mail or Visit Winnebago

problem is there is an RV for your system. you will need to do the following.
Drain all holding tanks, fresh water and sewage

1. Attach garden hose to fresh water fill and fill tank.
2. Turn on pump switch and open cold water side of all faucet/ shower fixtures. Leave open until water runs clear. Repeat for hot water side.
3. Flush toilet until clear water runs into bowl.
4. Dump tanks again.
5. Sanitize water system. use a water sanitizer
6. If a water filter is installed, drain lines, remove filter assembly, clean and reinstall with new filter.
7. When ready to use the water heater, turn by-pass valve to open position to allow water to enter and fill the hot water heater tank.

The water tank drain should have a shut off valve to prevent water leak. I wouldn't cap it, you should want to drain water tank on occasion.

U SHOULD HAVE A BLACK TANK AND A GRAY. TOWARDS THE BACK WERE U HOOK UP THE HOSE FOR DUMPING U WILL SEE TWO LEVERS ONE IS FOR BLACK ONE IS FOR GRAY. AND IF UR TALKING ABOUT FRESH HOLDING TANK LOOK UNDER NEATH AND U SHOULD SEE A PLASTIC NOSEL WITH A TURN VALVE LIKE WHAT BOX WINE HAS TO PURE A GLASS

Should be right on or near the fresh water tank.

Find where the fresh water tank fill is located. Directly below that under the coach you should see a single low point drain for the fresh water tank. It may have a cap on it but it may also have a valve at the location of the drain hose to the tank fitting.

There should be a fresh water fill on the outside of the coach. If not then there is a valve that would need to be turned that will allow water to be put into the fresh water tank. If that is the case then it will be a bit more difficult to put bleach into the fresh water tank but not impossible. There will be a pump that draws fresh water out of the tank. You can disconnect the input and output lines. Connect the input line which comes from the fresh water tank to the output side of the pump. Then using a flexible line with a 1/2" pipe thread fitting, connect that to the input side of the pump. Put the loose end of the flexible line into a gallon of bleach and turn the pump on. It will draw the bleach out of the container and pump it into the fresh water holding tank. Now return the plumbing of the pump back to the original configuration. Using the valve system complete filling the fresh water tank with fresh water and allow to sit for a couple of days. Then open the low point drain on the fresh water tank and completely drain. When the coach is not in use make sure the tank is completely drained. There is also a fresh water treatment that you can purchase at your local rv parts department.