P10.1.1 Preventive No water. Revise, or put maintenance in place Transmission System Reservoir programme in place: maintenance pump failure pressure. levels are schedule. regular due to difficult to Reservoir inspections mechanical maintain. Review levels. failure or lubrication service/ duty Frequent Pump overload. periods of seal replacement pump maintenance duplicate In addition to leaks repaired breakdowns. log. pumps (time in the possibility corroded Frequency of operation: E. coli. of components unacceptable time on contaminants replaced FAC. pressure standby). sucked annual ammeter drops in the into the water Carry out tests system. by back flow, residual daily visual Maintenance water hammer disinfection in inspection, etc. log not kept. can also cause the pipe failure. Planned maintenance distribution programme for zone if not replacement of presently with components as per done. DWSNZ:2000. manufacturer’s recommendations. All pumps itemised and maintenance schedule followed. Duplicate pumps for critical applications. Use duplicate pumps alternately (provides a check that both are functioning and will not need to be overhauled at the same time). Align and secure all pump-linked pipework, valves and fittings according to standard practice. Event: CHANGES IN PRESSURE, OR PRESSURE SURGES (WATER HAMMER) SUCK CONTAMINANTS INTO THE WATER cont’d P10.1.1 cont’d Install devices to lessen water hammer should it occur, eg: surge tanks air chambers slow-closing check valves surge suppressors.
P10.1.1 Transmission pump failure due to mechanical failure or overload. In addition to the possibility of contaminants sucked into the water by back flow, water hammer can also cause pipe failure. Preventive maintenance programme in place: regular inspections lubrication seal replacement leaks repaired corroded components replaced annual ammeter tests daily visual inspection, etc. Planned maintenance programme for replacement of components as per manufacturer’s recommendations. All pumps itemised and maintenance schedule followed. Duplicate pumps for critical applications. Use duplicate pumps alternately (provides a check that both are functioning and will not need to be overhauled at the same time). Align and secure all pump-linked pipework, valves and fittings according to standard practice. System pressure. Reservoir levels. Pump maintenance log. E. coli. FAC. No water. Reservoir levels are difficult to maintain. Frequent pump breakdowns. Frequency of unacceptable pressure drops in the system. Maintenance log not kept. with DWSNZ:2000. Revise, or put in place maintenance schedule. Review service/ duty periods of duplicate pumps (time in operation: time on standby). Carry out residual disinfection in the distribution zone if not presently done. Event: CHANGES IN PRESSURE, OR PRESSURE SURGES (WATER HAMMER) SUCK CONTAMINANTS INTO THE WATER cont’d P10.1.1 cont’d Install devices to lessen water hammer should it occur, eg: surge tanks air chambers slow-closing check valves surge suppressors.
treatment-pump-operation-feb14-v2.docx