1.0 Description. Valve pits shall be Hybrid PE valve pit packages as manufactured by Airvac. The nominal depth of valve pits (6, 8 or 10 feet) shall be ordered for each location as shown in table above (see JSP B) and brought to match the existing surrounding grade using concrete grade adjustment rings. The installation contractor shall purchase all vacuum valves, valve pits and associated equipment directly from the vacuum system manufacturer, with the exception of the gravity line stub-outs. Contractor shall be responsible for storage of all items. 2.0 Materials. All valve pit installations shall include the following components from the manufacturer: • Hybrid PE Valve Pit (sump and pit cone) • One-piece anti-buoyancy collar (1-inch thick PE sheet) • 3” Vacuum Valve • 3” pipe coupling • HP Controller • Suction and Sensor pipes • Factory-supplied rubber grommets for all pipe openings • Float assembly (N.C. Float Cable w/M12 High Level Switch with Monitoring Cable for use with LoRa Montioring pit radio, Float Installation Fitting, ¾” NPT Cord Grip) • 6” Air Terminal with mounting bracket • Traffic-rated cast iron frame and cover (existing may be used if in good condition) 3.0 Installation. Valve pits and appurtenances shall be installed per manufacturer’s instructions. 3.1 Lateral Connections. The Contractor is responsible for field-cutting holes and supplying the house gravity line stub-outs (4” or 6”, Contractor to verify existing lateral size). This includes any pipe and fittings needed to align existing laterals to the valve pit sump openings. All pipe and fittings must be Schedule 40 or SDR 21 pressure rated PVC. Correction of misalignment with flexible couplings, such as those by Fernco, will only be allowed in certain cases with approval of the City. Factory-supplied grommets must be used for pipe connections into the sump. Airvac grommets are designed to accept Schedule 40 or SDR 21 pressure rated PVC pipe. The end that passes through the grommet must be beveled and shall not protrude inside the valve pit more than 4” +/- 1/8”.
