Wells, Sump Pumps and Septic Sewage Systems - connection two pressure tanks

I have two pressure tanks that I want to hook together. One is an 85 gallon and the other is a much smaller one. Do I simply put a Tee somewhere in the system and hook the new one up? Do I have to adjust the pressure differently between the two tanks? I will also be installing a new pressure switch and gauge.

"Do I simply put a Tee somewhere in the system and hook the new one up?"

Yup.

You just gang them together in parallel. Pressure will be the same in both. Put air in one and it will be the same in the other because they are "T'd" together. You can put even more than two together using a manifold.

Are both tanks bladder tanks?

If they are, yes just "T" them together.
Make sure both tanks have the same amount of pressure in the bladder.


If they are not bladder tanks, they must be tied together top and bottom. If they are not tied top and bottom, the second tank is just a fat piece of pipe in line.


Travis

Thanks I read somewhere on the net that the bigger the tank the more pressure they should have, that was why my question about the amount of air pressure. I'm not sure what the new 85 gallon one is pressurized at. They are both bladder tanks. Where would the Tee be put in? Would it be the first fitting and then the standard Tee with the pressure switch and gauge coming next in line?. If that is the case then I guess it would come off the top of the Tee correct?

I am going to start drawing diagrams.
Here, look at this:
Picasa Web Albums - Eric - Pumps and wells (http://picasaweb.google.com/Eric.Vey/PumpsAndWells#)

I thought I understood until I looked at the set up that I have. Now I'm confused as to how the water gets into the expansion tank and then back to the house. This what I have. On the left side is the pipe coming in from the pump. On the right side is the pipe going to the expansion tank. How does the water then get to the house since there isn't another pipe running out of the expansion tank? Is there a way to post a picture here?

You are thinking too hard.
The reason that there is no in and out is because there doesn't have to be. The pump fills up the bladder with water. Air in the tank pushes it out.

Maybe this will help:
Well Pressure Tank | Homeowner's Blog (http://www.catskillhouse.us/blog/well-pressure-tank/)

Thanks the picture helps. It showed how it should be not the way mine is. I have a deep well being fed through a shallow well pump that is not doing any pumping at all. It is only in the mix to utilize the pressure switch and the pressure gauge mounted on it. I have other questions but I'd better start a new thread. Thanks to all those that responded.

Just curious, what's the point of two pressure tanks? I've never seen that, maybe I'll learn something new today. :)

Just curious, what's the point of two pressure tanks? I've never seen that, maybe I'll learn something new today. :)

Increases water volume. Reduces number of times pump has to start. Manifolding them together is what they do now instead of putting in a larger tank.

Thanks, I guess that makes sense. I've just never seen it.

I have a 20 year old pressure tank, so I figure any day now it'll give way. I tested it a couple months ago, and apparently the bladder is still intact and it holds the correct pressure. I think it's in a very small peer group, so it can't be long... :)