From Deep Well to Network: Pump, Filtration and Control as One System
Four interfaces decide a well-to-network installation. Why buying three correct components separately still produces a system that underperforms.
Going from a well to a working irrigation network means designing four interfaces in the right order: pump to filter, filter to main, main to zones, zones to emitters. Each interface has a number attached – a flow, a head, a pressure loss, a filtration class – and if any of those numbers is missing, the system is assembled on assumptions.
01 – Why each channel needs it, and where it is used
| Channel | Role in this decision | Why they need it |
|---|---|---|
| Distribution and wholesale | Supply the whole arrangement rather than one part | A well customer buys a pump, then a filter, then emitters, and blames the last supplier for a problem created between them |
| Contractors and integrators | Own the interfaces between components | The interface is where warranty arguments happen, and a written duty statement is the contractor’s defence |
| Direct B2B users – farms, estates, nurseries, municipal green | Run one system rather than three products | Downtime is caused by the interface – dry running, blocked filter, cycling – not by one component failing alone |
| Specifiers and influencers – water engineers, designers, consultants | Define each interface in the design | Every interface is a number in the specification; if it is not written, it will be discovered on site |
It appears in every installation where water is lifted from a well or tank and delivered to zones: farms with a dedicated pump set, estates with storage, nurseries with a well and a greenhouse, and municipal green with a rising main. The components differ; the four interfaces do not.
02 – How to make a preliminary selection
Start at the emitter and work backwards. The emitter class fixes the filtration class – pressure-compensating dripline is specified at 120 mesh by Rain Bird and Netafim – and the emitter count per zone fixes the zone flow. Simultaneous zones give the peak flow, and the peak flow sizes the filter.
Then size the pump against total head: lift, delivery height, and the losses in pipework, valves and filter. The filter loss has to be taken at the loaded condition, because that is the condition the pump operates in most of the time. Omitting it is the single most common reason a new system underperforms.
Then place measurement. A flow meter on the main and a pressure gauge at the filter inlet and at the far end of the longest zone turn the system into something observable. Without them, every fault is diagnosed from the plants.
Finally, set protection: dry run, phase failure and cycling are panel decisions, and they belong with the duty rather than with a separate purchase.
03 – Comparing the realistic options
The table frames the two ways a well-to-network system is actually bought.
| Question | Components separately | Arrangement specified together |
|---|---|---|
| Duty statement | One per supplier | One for the installation |
| Filter loss in pump sizing | Often omitted | Included at loaded condition |
| Protection | Self-protection only | Dry run and cycling covered |
| Measurement | Optional | Specified at commissioning |
| Warranty | Interface contested | Interface documented |
ISO 9906 provides the hydraulic acceptance basis for the pump side, and ISO 9912-1 classifies the filtration side, which is why a specification can name both without inventing criteria.
04 – What goes wrong, and what still needs confirming
Three interface failures cover most cases: the pump is sized on clean-filter loss, the filter is sized on average flow, and the control has no dry-run protection. Each looks like a component fault and each is an interface omission.
Items to confirm in writing: the filter loss clean and loaded; the pump duty including that loss; the meter’s range and installation point; the controller’s inputs and fault behaviour; the protection settings; and the commercial terms for the package – MOQ, price, lead time and documentation.
05 – What we can supply and what to send
Delta AgriFlow supplies the arrangement: deep-well pumps, pump control panels, filtration stations and compact filters, flow meters, PE pipe, valves, dripline and sprinklers.
Send six items: well depth and water levels; design flow and total head; protected equipment and filtration class; zone count and control requirement; power available; and the measurement points the operator can reach.
One sequence saves more rework than any other: measure first, then buy. Flow at the well, static and dynamic level, pressure at the far end of the longest zone – three readings that take an afternoon and settle the pump, filter and zone decisions before a single order is placed.
A second is to treat the filter as part of the pump duty. The pump lifts water through the filter; a pump sized without that loss delivers a system that works on the day of commissioning and disappoints by the end of the first month.
A third is to write down the simultaneity assumption. Two zones at once is different from three, and the difference is the size of the filter and the pump. The assumption should appear in the specification, not in the installer’s head.
A fourth is to plan the flush route before the filter is installed. Backwash water has to go somewhere, and a route agreed on the drawing costs a fraction of one improvised after installation.
Finally, commission with a record. Four numbers – zone flow, inlet pressure, far-end pressure and clean filter loss – describe the installation better than any datasheet, and they are the baseline against which every later change is measured.
What to record at handover
A handover that consists of a working system and a verbal explanation is not a handover. Three things have to be written down: what was installed and where, what the settings are, and what the routine is. Record the well data, the pump duty, the filter loss clean and loaded, and the far-end pressure of the longest zone.
The commissioning check matters as much as the record. Run each zone in turn with the filter clean and record flow, inlet pressure and far-end pressure; the numbers become the baseline for every later diagnosis. A reading taken once at commissioning is worth more than a datasheet, because it describes the installation rather than the product.
Finally, hand over the commercial part as clearly as the technical part. Hand over the duty statement and the component list together, because the next extension will be quoted against them. Without it, the next order restarts from zero, and the advantage of a standard package disappears.
What to prepare before commissioning
- Well data: depth, static and dynamic level
- Design flow and simultaneity assumption
- Total head including filter loss
- Filter class and cleaning routine
- Zone list with lengths and emitter counts
- Protection settings and alarm destinations
A detail that catches buyers: the pump’s maximum head and its duty head are not the same number. A pump rated for a high lift may deliver its best efficiency well below that, which is why the duty point on the curve matters more than the headline.
A second: the filter’s flush water comes out of the system. Where the source is limited, the flush volume has to be counted against the daily budget rather than treated as free.
06 – Questions, sources and next steps
Can the filter be chosen after the pump? It can be checked afterwards, but it is usually re-chosen. The filter loss belongs in the pump duty.
Is a filter needed on a clean well? Where the emitter is a pressure-compensating dripline, yes – 120 mesh is the published requirement, and the emitter is the tightest passage in the system.
What is the first sign of a mis-sized system? Pressure at the far end that cannot be corrected by opening a valve, usually combined with a filter that loads faster than expected.
One number worth writing into the duty statement is the lowest pressure the far end must see. Everything upstream – pump, filter, main, valves – can then be checked against that single figure, and disagreements about sizing become arithmetic.
A final commissioning check: close the filter bypass, let the element load, and confirm the pump still reaches the far end. That test reproduces the normal condition, which is where most systems quietly underperform.
Information boundary
This article describes how the decision is structured. It is not a performance specification and does not state capacity, flow, pressure or service-life values for a specific product. Those values are confirmed per project after a written quotation; manufacturer figures cited are the published values for those products, not project commitments.
Reviewed: 2026-10-26. Next review after supplier specifications are confirmed in writing.
Sources and further reading
- Rain Bird XFA 13 mm dripline datasheet – 120 mesh filtration requirement, 50-350 kPa compensating range
- Netafim Techflow bid performance specification – 120 mesh or finer filtration, disc grades 40-200 mesh
- ISO 9912-1:2004 – Filters for micro-irrigation: classification
- ISO 18471:2015 – Verification of filtration grade
- FAO – Irrigation manual, Chapter 6: drip irrigation
Building a well-to-network system? Send well data and the zone list through our quotation request.
