Senninger Pressure Regulator - 20 PSI Preset - 0.1-8 GPM - 3/4in NPT F×F - Max 100 PSI

Low-Hysteresis Pressure Regulation for Precise Low-Flow Irrigation, 20 PSI

Low-flow drip emitters and pressure-compensating stakes need especially stable outlet pressure, since small pressure swings translate into a larger percentage change in their already-low flow rate. Senninger's Pressure Regulator holds a steady 20 psi outlet across a 0.1-8 GPM range with low hysteresis, so outlet pressure stays consistent whether flow is increasing or decreasing through the cycle.

A large internal flow path keeps friction loss low and resists plugging from the particulate common in field and reclaimed-water irrigation, and the 3/4in NPT female inlet and outlet install above or below ground without extra adapters.

Key Features & Benefits

• Preset 20 psi outlet — delivers consistent low-pressure output suited to low-flow drip emitters, pressure-compensating stakes, and micro-irrigation systems.
• 0.1-8 GPM flow range — covers single-emitter points up to moderate multi-emitter zones.
• Low hysteresis — keeps outlet pressure nearly constant whether flow is rising or falling during the irrigation cycle.
• Large internal flow path — reduces friction loss and resists plugging from particulate in the water supply.
• Above or below ground installation — the 3/4in NPT female inlet and outlet work in surface manifolds or buried irrigation lines without modification.

Who Should Use This

This regulator fits drip irrigators, commercial greenhouse growers, and field irrigation professionals who need precise, low-hysteresis pressure control at 20 psi for low-flow emitter systems with variable inlet pressure.

About Senninger Irrigation

Based in Clermont, Florida, Senninger Irrigation has manufactured sprinklers, nozzles, and pressure regulators since 1963 and has operated as a Hunter Industries subsidiary since 2016. Its regulator lines cover a range of preset pressures and flow rates for drip, micro-irrigation, and overhead sprinkler systems.

Frequently Asked Questions

What does low hysteresis mean in practical terms?

Hysteresis is the difference between the pressure at which a regulator opens versus closes, and low hysteresis means outlet pressure stays close to the preset value whether flow is increasing or decreasing. That keeps low-flow emitters performing consistently through an entire irrigation cycle rather than drifting partway through.

Can this regulator be buried underground?

Yes, it's rated for both above-ground and below-ground installation. Use proper bedding and backfill around the regulator body for subsurface installations.

Is this regulator field-adjustable?

No, this model is preset at 20 psi and isn't adjustable in the field. A different Senninger regulator model is needed if a different fixed pressure is required.

How do I install this regulator into an existing line?

Thread the 3/4in NPT female inlet and outlet into your supply line and fitting. Install it in the flow direction indicated on the regulator body, whether the installation is above ground or buried.

Will the large flow path reduce regulation accuracy?

No. The larger flow path is designed to cut friction loss and plugging risk without compromising how precisely the regulator holds its rated outlet pressure within the specified flow range.