With an accent on safe operation of properly installed no-leak rubber gaskets, this booklet covers boilers from research on rubber formulations to steam-safety pop valves. Another premium available free from the company is its handy pocket slide rule, a palm-sized device that can chart steam temperatures up to 380 degrees Fahrenheit with corresponding psi up to 1,000 lbs.
Topog-E Gasket Co., (800) 527-7123; www.topog-e.com