pf_02823 - Laserfiche WebLink

Home

303.500 SETIING VALVES, VALVE BOXES, FlTIINGS AND CURB STOPS AND BOXES Gate valves and pipe fittings shall be set and jointed in new pipe in the manner heretofore specified for cleaning, laying and jointing pipe. Valve boxes shall be firmly supported, and maintained centered and plumb over the wrench nut of the gateyalve, with box cover flush with the surface of the finished pavement or at such other level as may be directed. AD geared valves and such other valves as may be designated shall be set in valve manholes with the wrench nuts readily accessible for operation through th~ manhole openings. Manholes shall be constructed in a manner that will permit minor valve repairs and to afford protection to the pipe ftom impact where it passes through the manhole walls and in compliance with Section 502.3. Temporary drainage necessary in the construction of the valve manholes should be moved after the installation is complete or receives approval of the proper State Board of Department of Health. Curb stops and boxes shall be located as shown on the plans. Bacldill shall be . accomplished to avoid displacement or bending of the curb box. 303.600 SETTING HYDRANTS Hydrants shall be located as directed by the ENGINEER or his representative and shall be placed as shown on 'the Standard Details of the plans. After each hydrant has been set, there shall be placed around the base of the hydrant, at least one-cubic yard of coarse gravel or crushed rock. A layer of four mil-thick polyethylene shall be carefully placed over the rock to prevent bacldill material entering the voids in the rock drain. All hydrants must be maintained in a plumb position. Hydrant extensions shall be used with "the ENGINEER's consent only. " 303.700 JOINT RESTRAINT Retainer glands shall be used for joint restraint on all bends having a deflection of 22 1/2 degrees or greater, tees, crosses, plugs, valves at the end of a line, all hydrant valves. and all hydrants. Restrained joints cast onto the pipe by the manufacturer (Lok- Tyton, Fastite, Mega Lug etc.), will be -considered as being equivalent to the use of retainer glands. If retainer glands are not available, thrust blocking may be used with approval of the Water Utility Inspector. The use of zinc coated tie rods suitably attached by half-circle clamps may be utilized with the ENGINEER's peImission. Where valves are located on dead ends, the valves may be tied or lugged across the valves with tie rods. 300-12