The head of the system keeps every dripper downstream working. Disc filters in 120 and 140 mesh, pressure regulators matched to your zone flow, and liquid filled gauges to confirm the result.
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Disc filters
Disc filters trap particles across a stack of grooved rings, which gives more holding capacity than a simple screen and makes cleaning quick: open the housing, rinse the rings and reassemble. Netafim filters are 140 mesh and GROW1 filters are 120 mesh, in 3/4 inch, 1 inch and 1.5 inch with male pipe thread on both ends. Each filter lists its flow range in GPM, from 1 to 17 GPM on the smallest model up to 10 to 52 GPM on the Super 1.5 inch. A replacement ring set and spine is available for the 3/4 inch filter.
Pressure regulators
A regulator holds downstream pressure steady so drippers and fittings stay within their working range. Choose by zone flow: low flow for 0.25 to 4.4 GPM, medium flow for 4.5 to 17.6 GPM, or the 1 inch wide range 40 PSI regulator for 0.5 to 35 GPM.
Pressure gauges
Liquid filled 0 to 100 PSI gauges resist vibration and give a stable reading. Placing one before and one after the filter shows when the filter needs cleaning.
Irrigation Filters, Pressure Regulators & Gauges FAQ
What order do the filter and regulator go in?
Water should pass through the valve, then the filter, then the pressure regulator, and then into the tubing.
120 mesh or 140 mesh?
Both are suitable ahead of drippers. 140 mesh is slightly finer and catches smaller particles.
How do I know when to clean the filter?
Compare the gauge reading before and after the filter. A growing pressure drop across the filter means it is time to rinse the discs.
