Concrete Vault. 1. Concrete vaults shall conform to the requirements and standards set forth in The Facility Owner’s Standard Specifications and standard details. 1. Release Valve Assembly 2. Air release valves shall have a small venting orifice to vent the accumulation of air and other gases in the line or system under pressure. 3. Air/vacuum valves shall have a large venting orifice to permit the release of air as the line is filling or relieve the vacuum as the line is draining or is under negative pressure. 4. Combination air valves shall have operating features of both the air/vacuum valve and air release valve. 5. Valves shall be suitable for pressures up to 250 psi. 6. Air release, air/vacuum valves, and combination air valves shall conform to the requirements set forth in The Facility Owner’s Standard Specifications and standard details.
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Sources: Contract Item Agreement, Amendment to Contract