As bobndot said the the water tank is under the dinette seat behind the drivers seat, the gravity fill is behind a locked door on drivers side like this
![](https://i.imgur.com/DYz75lVl.jpg)
Open it up and there you will find the fill spout,unscrew the cap and insert hose to fill the water tank.
![](https://i.imgur.com/6zacAi6l.jpg)
To hook to city water farther back on the same side you will find the hookup just unscrew the cap and attach your hose and turn it on
![](https://i.imgur.com/S5EN6hhl.jpg)
If you want to empty your fresh water tank,take the seat cushion off the forward dinette seat behind the drivers seat there will be a plywood cover and a small door open it up or remove the plywood you will see a valve like this just twist it so it aligns with the pipe and the water will empty under the RV.
![](https://i.imgur.com/O0wc74tl.jpg)
Any other things I can help with just ask,I have a 2006 Fleetwood Tioga 26Q
2006 TIOGA 26Q CHEVY 6.0 WORKHORSE VORTECFormer El Monte RV RentalRetired Teamster Local 692Buying A Rental Class C