Watts 0121475 Valve Els PW 17895 How do I adjust the

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Watts 0121475 Valve Els PW 17895 How do I adjust theThe Watts 0121475 (Model LF174A 3 4 100) is a high capacity pressure relief valve designed specifically for protection against excessive pressure in large hot water heating boilers and low pressure vessels. Featuring a Lead Free copper silicon alloy body, this 3 4 inch NPT threaded valve is engineered for durability and compliance with modern potable water safety standards. With a factory preset relief pressure of 100 PSI and a high BTU steam