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specific seal kits are required
typically those requiring an adapter for updated control board revisions
5" Johnson Controls valves
These are sweat-style connections designed for standard copper refrigerant tubing
Watts 0276770 Valve 320788-703 specific seal kits are requiredThe Watts 0276770, also designated as the Model 174A 1. 5 75, is a high capacity boiler pressure relief valve engineered specifically for heavy duty hot water space heating applications. Constructed with a rugged bronze body, this 1 1 2 inch NPT female threaded valve is built to manage large scale hydronic systems with a massive relief capacity of 4,125,000 BTU hr. Set at 75 PSI, it provides critical overpressure protection for commercial and
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