Low Water Pressure?

If your garden reticulation system is only dribbling instead of giving the usual strong flow, there are a few common causes worth checking:

1. Water Supply Issue

·       The mains tap might not be fully open.

·       Water Corporation (or local supply) could be carrying out works and lowering pressure.

·       A partially closed isolation valve can restrict flow.

2. Solenoid Valve Problem

·       The solenoid may be stuck partially open or blocked with grit.

·       A failing solenoid coil may not be lifting the diaphragm properly.

·       Sometimes a damaged diaphragm inside the valve lets only a trickle through.

3. Blockages

·       Filter screen at the master solenoid, inline filter, or pump strainer could be clogged.

·       Bore water systems often build up iron bacteria or sand, which can plug nozzles and pipework.

·       Roots or debris inside the lateral lines can reduce flow.

4. Pump or Bore Issues (if not mains)

·       Pump may have lost prime.

·       Impeller may be worn or blocked.

·       Bore yield could have dropped (e.g., clogged screen).

5. Broken or Leaking Pipe

·       A split or leaking pipe underground can dump most of the pressure before it reaches the sprinklers.

6. Reticulation Controller Settings

·       If it’s only happening on one station/zone, that solenoid or line is the issue.

·       If all stations are affected, it’s more likely a supply, master valve, or pump problem.

👉 Quick checks you can do:

·       Run different zones — do they all dribble or just one?

·       Open a manual flush cap at the solenoid valve — do you get good flow?

·       Check the filter screens at the valves and sprinklers.

·       Inspect your pump (if you’re on a bore) for prime and pressure.