As water pressure changes, the volume of air in a bladder. pressure tank contracts and expands. Periodically, the amount. of air in the tank should be measured and the tank recharged if. the air is too low. Bladder pressure tanks do not provide any. useful water storage capacity.
Add Image. Exotic Materials are the strange and unusual elements produced by science, nature, or some strange alien force. Such materials could be alloys, isotopes, chemicals, and such.
Outdoor Furniture Material and Care Guide. 1  Lightweight construction makes it easy to rearrange and store. 2  Resists rust and moisture damage better than other metals. 3  Powder coating offers added protection against the elements. 4  Tubular aluminum, made with cylindrical aluminum tubes, is the most lightweight option.