Irrigation Filtration Systems remove sand, silt, algae and organic matter before water reaches your drippers, micro-sprinklers or nozzles. Tell us your water source and flow, and independent irrigation specialists that may cover your area reply with filter options and prices.
Send your water source, flow rate and emitter type to get filtration quotes.
Get the Best QuoteWhat Irrigation Filtration Systems Include
- Primary filter. Sand media or hydrocyclone units that take the heavy load of organic matter or sand.
- Secondary filter. Disc or screen filters that catch the finer particles that would block emitters.
- Backflush valves. Valves that reverse flow to clean the filters, either by hand or automatically.
- Controller and gauges. Pressure differential switches or timers that start backflush when filters clog.
- Manifold. Pipework, isolating valves and air valves that tie the filter bank into the headworks.
Who It Suits
Any drip, subsurface drip or micro system, where small emitter openings block easily. Overhead sprinklers need less filtration but still benefit when water comes from a river or open dam. Farms with borehole water high in iron or manganese also need filtration, sometimes with treatment ahead of it.
Filter Types and Selection
- Screen filters. Simple and cheap for clean borehole or municipal water. Clog quickly with algae.
- Disc filters. Stacked grooved discs that hold more dirt than a screen and backflush well. Common for drip.
- Sand media filters. Best for dam and river water heavy in algae and organic matter. Usually installed in pairs or banks.
- Hydrocyclones. Spin out sand and heavy particles from borehole or river water before the main filter. They do not remove organic matter.
Match the filter rating (in mesh or micron) to what the emitter manufacturer specifies, and size the bank for your peak flow. A water quality test shows whether you are dealing mostly with sand, organic matter or dissolved iron.
How the Job Runs
- Water assessment. The specialist looks at the source and recommends or reviews a water quality test.
- Sizing. Peak flow, emitter requirements and the dirt load set the filter type, number of units and rating.
- Quote. You receive a filter bank layout with backflush method and pressure loss figures.
- Installation. The bank is fitted at the headworks with valves, gauges and drainage for backflush water.
- Commissioning. Clean pressure loss and backflush settings are recorded.
Irrigation Filtration Systems Prices
Ballpark prices so you can sanity-check a quotation.
| Item | Ballpark price |
|---|---|
| Disc or screen filter, 2" | R3,500 - R12,000 |
| Hydrocyclone | R6,000 - R30,000 |
| Sand media filters, pair | R30,000 - R120,000 |
| Automatic backflush disc filter bank | R40,000 - R250,000 |
| Water quality test | R1,500 - R3,000 |
Prices JUST UPDATED. Ballpark figures, rounded, excluding VAT unless stated. They are compiled from published South African cost estimates and typical supplier and contractor rates. They are not our prices or quotations, and no contractor is bound by them. Unless a row says otherwise they exclude the water source, power supply and earthworks, so confirm exactly what each quotation includes.
Sources:
- Pro Irrigation - cost of installing an irrigation system in South Africa
- Typical South African supplier and contractor rates
Get prices for your farm rather than a range. Send one request and compare replies.
Get the Best QuoteWhat Affects the Price
- Flow rate. Higher flows need bigger or more filter units.
- Water quality. Dirty dam water may need sand media plus disc filters.
- Automation. Automatic backflush costs more than manual cleaning but saves labour and protects emitters.
- Materials. Steel tanks, plastic housings and coatings vary in price and lifespan.
Maintenance
Watch the pressure gauges either side of the filter. A rising difference means it needs cleaning. Check backflush valves work, top up or replace sand media as it wears, and clean disc stacks and screens by hand when automatic flushing is not enough.
Irrigation Filtration Systems FAQs
Which filter do I need for dam water?
Dam and river water with algae usually needs sand media filters, often followed by disc or screen filters for drip. A specialist will confirm based on your water and emitters.
What micron rating should I use?
Follow the emitter manufacturer's recommendation. Drippers and buried drip usually need finer filtration than micro-sprinklers.
Is automatic backflush worth it?
On larger systems or dirty water it saves labour and avoids blocked emitters. Small systems on clean water often manage with manual cleaning.
Can filters remove iron?
Filters catch iron once it has formed particles. Dissolved iron often needs aeration or treatment first, so test the water before choosing.
Related Services
Request filtration quotes through Agricultural Irrigation South Africa and compare the filter type, rating and backflush method each specialist proposes.
Agricultural Irrigation South Africa is a quote-comparison service. We do not design, supply, install or repair irrigation systems, and we do not employ contractors. Work is quoted and carried out by independent irrigation businesses, and your contract is with the business you choose. Ask each one for a written quotation that names the equipment, design flows and pressures, preparation, timing and any warranty terms before you pay a deposit.
Irrigation Filtration Systems. Describe your irrigation job once and compare replies from independent contractors.
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