Water Worker 4.4 Gallon Thermal Expansion Water Heater Safety Tank. It features a steel outer shell, polypropylene lined water reservoir, heavy duty butyl diaphragm, and leak proof precharged air chamber. This tank reduces pressure build up and harmful pressure spikes in closed water systems, temporarily absorbing expanded water overflow. It is UL listed and has a maximum temperature of 200 degree Fahrenheit. Comes boxed.
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov