Rainwater Harvesting Pumps details
Rainwater harvesting pump faults we investigate
A rainwater pump can stop, run without delivering water, cycle too frequently, lose pressure, make unusual noise or trip the electrical supply. These symptoms can be caused by the pump itself, but they can also originate in the tank level, inlet filter, suction line, non-return valve, pressure vessel, level controls or control panel.
Before attendance, check the tank level and any visible control-panel message without entering the tank or opening electrical equipment. The pump label and a photograph of the installation often help identify the likely arrangement.
No water or low pressure
No water at an outlet may indicate an empty tank, blocked filter, closed valve, air entering the suction pipe, loss of prime, failed level device or loss of electrical supply. Low pressure can also result from a worn pump, unsuitable pump selection, leaking pipework, a pressure-control fault or demand that exceeds the original design.
Diagnosis should establish the available water level, whether the pump starts, its operating pressure and flow, and how the controls respond before parts are ordered.
Pump servicing and preventative maintenance
Routine maintenance can include checking accessible filters, inlets, valves, pressure vessels, pump condition, seals, control equipment, alarms, level devices and dry-run protection. The required interval depends on the equipment, water quality, operating hours and importance of the supply.
Commercial and estate systems may benefit from planned maintenance where a failed pump would interrupt irrigation, wash-down, toilet flushing or another regular non-potable demand.
Rainwater pump repair or replacement
Repair may be appropriate when parts are available and the pump remains suitable for the system duty. Where replacement is more practical, AFS reviews the required flow and pressure, suction or submersible arrangement, electrical supply, controls, frequency of use and the space available for installation.
A like-for-like physical fit does not always provide like-for-like performance. The selected pump also needs to work with the existing level controls, pressure controls, pipework and protective devices.
Controls, level devices and mains backup faults
Some apparent pump faults are control faults. Level sensors, float switches, pressure controllers, contactors, inverters, alarms and mains backup equipment can prevent the pump starting or make it cycle incorrectly.
Any backup connection to the drinking-water supply must maintain the required protection against contamination and cross-connection. AFS can assess the existing arrangement and identify where specialist plumbing or electrical work is required.
Existing system upgrades
An older harvesting system may need more than a replacement pump if demand has changed or the original storage and controls are no longer suitable. Upgrades can include pump and control changes, level monitoring, filtration improvements, pressure equipment and better access for maintenance.
For a new collection, tank and distribution project, visit our rainwater harvesting system installation page. If additional capacity is the priority, see water storage tank supply and installation.
Book rainwater pump support
AFS supports rainwater harvesting pump systems within about 50 miles of Alton; for sites more than 40 miles away we will confirm whether we can attend. Send the postcode, fault details and equipment photographs, or call 01420 561661.
