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F-7 <br /> A pumping tank of this size should not be installed in a situation <br /> where any drainback occurs. For example, with 6 gallons of drainback, <br /> a pump would deliver a net of only 2 gallons per cycle. If drainback <br /> in the pipe between the pump and the septic tank were 9 gallons, <br /> the pump would continue to recycle continuously until it eventually <br /> burned out. <br /> Whenever such a pump is used to deliver raw sewage to a septic tank, <br /> dose volume should be limited to minimize the impact on the pump. <br /> Since a compartmented tank or two tanks are used, the volume <br /> can be 5% of the first tank volume. Also, whenever sewage solids <br /> are pumped, there should be two septic tanks in a series to provide <br /> for adequate solids separation. .. <br /> Pumping Station Specifications <br /> A complete pumping station with a tank, pump and controls is shown <br /> in Figure F-7 and in F-8 in more detailed form.The pumping tank <br /> must be watertight and constructed of materials that will not corrode <br /> or decay. The manhole should be installed to the ground surface but <br /> securely fastened or locked so that unauthorized persons can't get <br /> into the pumping tank. <br /> ALARM WIRE <br /> PIGGY HACK PLUG IN WEATHER MANHOLE COVER SFC''RI:0 TO <br /> PROOF ENCLOSURE-OR LOCATE PREVENT UFAUTHORILL 1.1 <br /> IN HOUSE BASEMENT ENTRY <br /> POWER SUPPLY--''fl UNION OR OTHER nUICK <br /> . CONTROL WIRE DISCONNECT FITTII.0 <br /> W ~' PUMP POWER CARD <br /> It w+IFOQMC SLDOPOENFROM <br /> 2(MANHOLE • i'UMP STATION UP TO <br /> i - IIL TREATMENT AREA <br /> FROM . <br /> II ' FOR PROPER DRAINBQL$ <br /> [SEPTIC -d.{ 1.J_ PLASTIC ROPE OR CHAIN <br /> • <br /> TANK � 4. IFdE Pt/ <br /> TIPE AT TANK UNION- <br /> t" <br /> 1` WITH ANCHOR ALARM FLOAT ON SEPARATE i;I s / TO GET ELEVATION FOR <br /> ELECTRICAL CIRCUIT :1 .0 DRAINBACK. A'/4 INCH <br /> ERRESVE CAPACITY 1 , WCEP HOLE MUST eE <br /> c>.23 !I <br /> AFTER ALARM SOUNDS ( USED <br /> 5acf 14 1 <br /> 1. <br /> 1 <br /> 4 _ <br /> — -i--- -5t± QEF — . <br /> I2-he'MINIMUM DEPTH �A PUMPAALE >} h �� 17 <br /> Ct PAC i(Y do: _ <br /> AT LEAST k <br /> la(a 31i. GALLONS <br />