How to Maintain Drip Irrigation

Why the calendar, not the reaction

The farms that get years from a system are the ones where the routine is on a calendar and the calendar is kept. The common problems guide opens with the slow clog, because it's the common one — and the slow clog is the failure that the calendar prevents and the reaction finds too late. A filter cleaned on the calendar degrades slowly; one cleaned "when the field complains" degrades fast, and the field's complaint is already a crop loss. The routines below are short; the value is in the keeping.

The daily and weekly (the irrigation season)

• The pressure check. Where the system has the gauges (the head, the zone take-offs), the daily read is the system's health number: the pressure at the head and at the far end of the running zone. A drift in the read is the early signal — the clog, the weep, the pump's wear — before it's the crop's problem. (No gauges? The upgrade adds them; the read is the cheapest diagnostic in the system.)
• The line walk (weekly). The end rows first, where the blockage shows first — the flush points opened, the water coming out watched (clear vs the sediment and the colour), the lines checked for the kink, the puncture, the animal damage. Ten minutes at the end of the week is the routine that catches the slow clog in the row, not the field.
• The filter routine (weekly to monthly, by source). The disc filter: the disassemble-and-rinse (the discs off, the water through, the reassemble) — weekly on the surface water (the filtration guide is the setup), monthly on the clean borehole. The sand/media filter: the backwash (the reverse flow that flushes the media) on the calendar. The pressure-drop gauge across the filter is the number — a rising drop is the clog's tell, before the emitters show it.

The monthly (in season)

• The emitter sample. A sample of emitters per zone — the end ones first, where the blockage shows — checked for the flow against the rated flow. A sample that's even, the system is even; a sample that's drifting, the filtration or the line is the story. The emitters are the crop's interface, and the sample is the check.
• The valve cycling. Every valve cycled — opened, closed, opened — a valve sealed for months is a stuck valve, and the stuck valve is the start-up's failure. The solenoid valves (the automated system) are the same: the cycle check that the operation is held.
• The joint inspection. The fittings and the joints walked for the weep — the weep is the small leak that compounds, and the re-join is the short fix before it's the dig. The common problems guide walks the leak diagnosis.

The seasonal (the two jobs that matter most)

Two routines bookend the season, and they're worth more than anything on the monthly list, because they're when the system is proved and when it's rested:

• The start-up (pre-season). Before the crop depends on the system: cycle every valve (the stuck-valve check after the months sealed), flush every line (the sediment and the overwintering is what the flush clears), clean and inspect the filter (the media's state, the discs' condition), check the pump (the cavitation, the seal's weep, the intake strainer), and verify the controller schedules (the run times, the zone sequence). The system is proved before the crop needs it — that's the whole point of the start-up.
• The shutdown (end of season). When the crop is done and the system rests: drain the lines where the design calls for it (the cold-storage protection where the winters bite), clean the filter and store it (the media dried, the discs rinsed and stowed), cap and coil the drip lines out of the light (the seasons are earned in the storage, not just the field — the tape vs line guide walks the handling), and winterise the pump where relevant. The shutdown is when next season's system is decided — the line that's coiled out of the light gets its seasons; the one left in the sun doesn't.

The component routines, at a glance

What the routine prevents

• The slow clog — the season-long emitter blockage that starts as a row and ends as a field. The filter routine and the line walk are the prevention; the line cleaning guide is the cure when it's found.
• The pressure drift — the weeping joint, the fouled regulator, the degrading pump — each small, each compounding. The monthly checks are the prevention; the repair is the fix when it's found.
• The start-up failure — the stuck valve, the seized pump, the filter-less first week. The pre-season check is the whole point.
• The line-life loss — the storage and handling that decide whether the multi-season line gets five seasons or two. The shutdown routine is the prevention.

Run it yourself, or run it as a service

The routines above are the farmer's own — the maintenance is the knowledge, and the calendar is the keeping. Where the operation earns the service, the maintenance service runs the same calendar as a standing arrangement — the visits on the schedule, the report after each, the small improvements that accumulate. The service page walks the model; the assessment is where the calendar is built from the system's design and the water source.