Water Worker 2 Gallon Thermal Expansion Water Heater Safety Tank. It has a steel outer shell, polypropylene lined waterreservoir, heavy duty butyl diaphragm that flexes, leak proof pre-charged air chamber, reduces pressure build up and harmful pressure spikes in closed water systems, temporarily absorbs expanded water overflow. It is UL listed. Adjustable air charge fitting with protective plastic cap for airtight seal. Factory pre-charged at 40 psi. Maximum working pressure of 150 psi. Maximum working temperature of 200° F. Safe for domestic potable water use. Satisfies plumbing code requirements. Protects water heaters, fixtures and other appliances. IAPMO and NSF complaint. Limited 5-year warranty.
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