You remember when we installed the large 5,500 gallon water tank?
It was there primarily for the fire department so they could suck water from it in case of a fire. At least 4,000 gallons are required by the fire code out here for that purpose. That tank is filled automatically by the well pump when water is used out of it. It has a toilet like fill valve in it. Anyway, after inspection, I added a 2" valve so I could use the remaining 1,500 gallons for irrigation. The valve is connected to a 2" gravity feed line which runs out to the house and different parts. I had that installed in the same trench when the pressurized well line was installed.
Also, I really wanted that tank to be constantly refreshed with water in case our main system failed.
We would then have enough drinking water at least until we got the well pump fixed or whatever. So I decided to add a 2hp booster pump (220v) to non pressurize the 2" line. I also added another manifold with several valves in case I wanted to irrigate behind the barn or for other purposes. Now, that entire line is also pressurized up to 45psi. At the home, with added head pressure, we get about 60psi altogether. That system is what I use for the irrigation or emergency use and feeds those watering stations on the decks at the house. It will also drain part of the large water tank, thereby adding fresh water from the well every day.
The 2 bladder pressure tank systems are separate ... one for the house (well pump) and one for the irrigation (large water storage tank). In fact, the two system are completely separate from each other except the large water storage tank relies on the well pump to fill it, of course. But there are valves on each system that can be connected via a garden hose so that if the well pump fails, I can hook up a hose connecting the water storage tank to the well pump bladder tank and feed the house (still under pressure) from the large water storage tank now. With the water being refreshed every day, it should be drinkable in case of an emergency.
Rob-