Hi divedreamer,
First of all, congratulations on your new rig and welcome to the Heartland family and to the Owners Forum. You'll find lots of friendly people here who are willing to share their knowledge and experience.
On the TV receptions, first thing to check is the amplifier switch that's often found in the bedroom where the panel for the bedroom TV connections are. There's a small button that when pushed in, turns on the amplifier for over-the-air reception. It'll light up when the amp is on. When hooked up to cable, the amp must be off or you won't get a signal.
If the amp is already on, make sure the TV is connected to the correct connector. There'll be a connector for antenna/cable, and another for satellite.
If that's ok, you have to set your TV to AIR (not cable) and search for signals in the area.
If none of that solves the problem, you may have a bad connector between the antenna and wall connector. Check for loose coax connectors, or threads from the ground touching the center conductor. If you can run a cable from the bedroom connector directly to your TV, you may be able to narrow down the search. The antenna signal usually goes to the bedroom, then to the basement, then to the living room.
The water system with the new valve, where you change the dial to fill the fresh tank, should fill the tank as fast as water is coming in from the hose. If you have a 90 gallon tank (not sure what yours is), and you're getting 3 gpm through the hose, it'll take 30 minutes. But you're probably using a water pressure regulator (and should be). The cheap ones may only allow 1 gpm - which would take 90 minutes. More expensive regulators allow 4-6 gpm while limiting pressure. If you have a water filter, that may also slow the water flow.
Here's a link to more info about water pressure and water flow. They also sell better regulators.