Depends why you are doing it. In almost every case I've seen of this, one larger tank will work better. The only possible good reason to do it is servicing a small village or 30-50 homes where the largest bladder tank is still not large enough for peak demands. In this case you plumb 2-3 of them in parallel..
Bladder water tanks are relatively durable, however they will not last as long as steel and other metal water tanks. They are very favorable, however, for when you need your water tank to be mobile, as they are easy to transport.
Bladder water tanks contain a rubber bladder from which the water is used. As the water pressure goes down it turns on a switch which causes the water bladder to be refilled from the attached well.
From what?ANS 2 -Defective bladders are quite common when tanks are 10 or more years old. -On most tanks over 50 gal or so, the plate on base where incoming water is connected, can be unbolted. BEFORE doing this, MAKE SURE you can get a new bladder ! - Not all tanks companies will sell just the bladder, and some make them so expensive you may as well buy a new tank ! When this is done, just pull out the old bladder and carefully insert the new one. -I've done this on many tanks bigger than 120 gal - you have a large hole to work with there. Smaller tanks are not so easy.
bladder tanks are much better for the pump and will be fine as a replacement.
Bladder water tanks are used under houses and mobile homes and act as a water tank but is like a giant balloon instead of a solid tank. As it fills with water the tank gets bigger.
Install air bladder.
depending on the brand name of your pressure tank and what kind of bladder material they used but most larger pressure tanks need to be vertical so the bladder expands equally. I would check with your pressure tank manufacture.
All bladder tanks (unless very small) have a way to fill the bladder bag. Depending on what you are using this for you may need a bigger bladder tank.
Defective bladder / low pressure inside the tank
Unrelated to any evaluation of the heart, the Valsalva maneuver also is taught to patients with multiple sclerosis who are unable to fully empty the bladder (flaccid bladder).
Jet skis gas tanks
Water bladder tanks are tanks which contain a rubber bladder that is filled with either water or air. The majority of water bladder tanks have water-filled bladders. When a water faucet is turned on or a toilet is flushed, the water is piped in from the water tank. As the water pressure and air pressure get low, the contacts on the pressure switch click together. The pressure switch sends an electrical current to the water pump which causes the water pump to kick on and pipe water back into the water bladder tank. The amount of time it takes for the pressure switch to click on depends upon the size of the water bladder tank. The larger the water bladder tank, the longer it will be before the pressure switch starts to deliver electrical current to the water pump. Read more: How Does a Water Bladder Tank Work? | eHow.com http://www.ehow.com/how-does_5001805_water-bladder-tank-work.html#ixzz2A9TeSAnX found this on www.ehow.com