How do you fill fresh water tank on a 5th wheel

Generally, on fifth wheels, the fresh water tank is in the rear area of the rv, but the pump is usually up near the front near the rest of the plumbing. Ie water heater, bathroom, etc. There are storage areas in the front, usually, the pump is on the side where the door for entering the trailer is. Open the storage access door that is on that side in the front and look at the panels that close off tbe storage area to the living quarters of the rv. There is usually a hole for access to a “winterizing point” marked. There us where you will find the pump

is your fresh water tank full it could be a overflow or a low point drain

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.

Here are some troubleshooting steps you can try to resolve the problem:
1. Check the Water Pump:
- Make sure the water pump is turned on and functioning correctly. The water pump is responsible for drawing fresh water into the holding tank from an external source.
- Check for any visible signs of damage or blockages in the water pump system.
2. Verify the Tank Fill Valve Position:
- Ensure that the tank fill valve is in the correct position to allow water to flow into the holding tank. The valve may need to be switched from the city water connection to the tank fill position.
3. Inspect the Water Inlet:
- Check the water inlet connection where you fill the fresh water tank. Make sure there are no obstructions or kinks in the hose that could be preventing water from entering the tank.
- If there is a water filter in the system, check if it is clogged and needs to be replaced or cleaned.
4. Test the Gravity Fill System:
- If your RV has a gravity fill system for the fresh water tank, try filling the tank using this method. Pour water directly into the gravity fill port and monitor the tank level to see if the water is entering the tank.
5. Consult the RV Manual:
- Refer to the owner's manual of your Coachmen Elite RV for specific instructions on filling the fresh water tank and troubleshooting water system issues.
I good luck

Good luck on finding any piping information, even from the MFR for that. Your best bet is to remove the access panels where the fresh water inlet connects to the camper and distributes throughout the unit. Typically, the connection will be near the hot water heater then once inside, there will be a "T" connection where the water will split off to the Hot Water Heater. After that, you should see the water go back towards the wall to go through a bypass valve, which is the lever used to bypass the tank fill or direct the water into the tank fill. This is where is can get difficult to find. Many 5th wheels will have the fill line go into and behind panels that are not easily accessible or they get directed under the camper where you will have to remove belly skin panels to be able to trace.

At each one of these areas where there is a connection or corners, have someone outside turn water on/off to prevent excessive water spillage and keep any water from getting inside your unit to get soaked into wood and carpeting.

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

Should be a low point drain near the tank fill area underneath the trailer.

There should be a valve near the pump or if you have a travel trailer or 5th wheel follow the hose that is leaking, up and you should see a valve.

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.