Sanitary Sewage Pump Stations - The City of Wentzville | Missouri

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402.5 Discharge Risers. When plastic pipe is utilized for the pump dischargeriser and the riser exceeds 12 foot in length, a stainless steel support brace must be installedbetween the riser and wet well wall. The brace shall be placed approximately on the middle ofthe riser but kept above the normal operating level of the well. Two (2) braces will be neededon lengths in excess of 20 feet.402.6 Gate and Check Valves.a. Gate valves: Gate valves shall be ductile iron body resilient seated gate valvesconform to AWWA C509 (latest revision), Resilient-Seated Gate Valves for WaterSupply Service. The gate valve shall be of the non-rising stem, open left(counterclockwise), bronze stem type. The interior and exterior surfaces shall becoated using a fusion epoxy, 10 mil thickness. Epoxy shall meet or exceedANSI/AWWA C550 Standard, and certified to ANSI/NSF 61.. Valve operatorsshall be by manufacturer’s standard hand wheel. All valve hardware, stemextensions and guides shall be stainless steel.Acceptable manufacturer and model: Mueller Co., Series 2360, or approvedequal.b. Check valves: Check valves shall be full body flanges type, with a domedaccess cover and only one moving part, the flexible disc, conforming to AWWAC508 (latest revision), Swing-Check Valves for Waterworks Service, 2 inch (50mm) Through 24 inch (600 mm) NPS.The valve body shall have full flow equal to nominal pipe diameter at all pointsthrough the valve. The seating surface shall be on a 45-degree angle tominimize disc travel. A threaded port with pipe plug shall be provided on thebottom of the valve to allow for field installation of a backflow actuator withoutspecial tools or removing the valve from the line.The top access port shall be full size, allowing removal of the disc withoutremoving the valve from the line. The access cover shall be domed in shape toprovide flushing action over the disc for operation in lines containing high solidscontent. The disc shall be of one-piece construction, precision molded with anintegral o-ring type-sealing surface, and contain steel and nylon reinforcement inthe hinge. The flex portion of the disc shall be warranted for 25 years. Non-slamclosing characteristics shall be provided through a short 35-degree disc strokeand a memory disc return action.The valve body shall be construction of ASTM A126 Call B cast iron. Optionalbody material includes ASTM A536 Grade 65-45-12 ductile iron. The disc shallbe precision molded Buna-N (NBR), ASTM D2000-BG.Valves shall be provided with flanges in accordance with ANSI B16.1, Class 125.The interior and exterior surfaces shall be coated using a fusion epoxy, 10 milthickness. Epoxy shall meet or exceed ANSI/AWWA C550 Standard, andcertified to ANSI/NSF 61.400 - 6City of WentzvilleConstruction Specifications and Standard DetailsEffective Date: 06/10/09
Acceptable manufacturer and model: Val-Matic, Swing-Flex Check Valves Series#500.402.7 Valve Chamber Drain Valve. A backwater check valve shall be installedon the valve chamber drain line. The valve shall be installed as follows:A 4” diameter PVC stub shall be glued into the 4” diameter coupler cast into the wet pit wall atthe valve chamber floor line. A 90° elbow shall be glued to this stub and directed toward the wetwell floor. A (4”x3’) PVC stub shall be glued into the other end of the elbow. The check valveshall then be slipped on to the stub and attached with 2 stainless steel clamps to be supplied bythe vendor.Acceptable manufacturer and model: The valve shall be a “Tide Flex” series TF-2, 4” (slip on)check valve, by Red Valve Co., EVR Type CPO-4”.402.8 Pressure Sensors. Each installed pump shall have an in-line full-portedpressure sensor installed on the pump side of the discharge line. The sensor shall be located inthe valve chamber ahead of the gate and check valve. Sensor specifications may be found inSection 404.10.402.9 Gravity Lines Entering The Station. Ductile iron pipe shall be used onsections of gravity lines running from:a. The last manholes preceding the station up to the station.b. The outfall of the retention pipe up to the station.Concrete or PVC gravity lines in these areas will not be acceptable.402.10 Retention Pipe. Retention pipe shall be Class 2-O’ring type RCP. Class3-O’ring RCP shall be used at installations where there will be vehicular traffic over the pipe.The retention pipe ends shall be bulk-headed using pre-cast bulkheads with an “A-Lok” gasketinstalled in the outfall side for the 12” gravity line of the station. The inside & outside of the pipeshall be sealed with a commercial grade water proofing sealer.Acceptable manufacturer and model: SS1H, Slow Setting Emulsion, as manufactured byMissouri Petroleum, Bi-State Emulsions, Inc., or approved equal.END OF SECTIONCity of WentzvilleConstruction Specifications and Standard DetailsEffective Date: 06/10/09 400 -7
Page 1 and 2: DIVISION 400SANITARY SEWAGE PUMP ST
Page 3 and 4: provided for flexibility. The openi
Page 5: SECTION 402Piping and Valves402.1 D
Page 9 and 10: pumping unit to the discharge conne
Page 11 and 12: . Conventional double mechanical se
Page 13 and 14: 5. Off Float - The entire pump shal
Page 15 and 16: SECTION 405Electrical405.1 Descript
Page 17 and 18: 4. Point #10 - High Water LevelIf t
Page 19 and 20: e cut out allowing access to sectio
Page 21 and 22: Pumps 20 HP and larger shall be sup
Page 23 and 24: x. Entry Switch: An entry switch sh
Page 25 and 26: . If an alternate power supply is n
Page 27 and 28: 405.9 Control Panel Mounting. The s
Page 29 and 30: SECTION 406Station Paving, Fencing,
Page 31: 5. Horizontal support bars shall be

Sanitary Sewage Pump Stations - The City of Wentzville | Missouri

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