ACDNate wrote:
Here's another newbie question.
![](https://lh6.googleusercontent.com/-X_m1pVaJRiA/UzIgReu6OJI/AAAAAAAAEwo/GA1J5IUAaeI/s640/IMG_20140325_185023.jpg)
So the bib on the right is to connect to pressured water.
Is the left side to fill up the holding tank? Is there some kind of adapter that I need to hook a hose to it?
Your fresh water tank should have at least three fittings:
1. Large fill opening
2. Small vent opening
3. Small draw opening
4. Optional small or large drain openining
When filling the tank, the vent will allow air out of the tank as it is displaced with water. The draw line will be plumbed to your on demand 12VDC electric pump. This system allows you to have running water without hookups. If you have a drain, it allows you to dump excess water or to flush your fresh water tank. If you do not have a drain, this has to be done through the pump (you can run a t-fitting off the pump supply side for drain or flush operation without having to run the pump.
When you do have have a water faucet available, the above components are not needed. The faucet is connected to the threaded fitting which is plumbed on the output side of the pump. The water is pressurized from the faucet so there is no need to run the pump or fill the fresh tank.