Netafim 3/4in Low Flow Pressure Regulator 35 psi, 0.25 - 4.4 GPM

Netafim 3/4 Inch Low Flow Pressure Regulator, 35 psi

This Netafim regulator handles the small zones that larger regulators cannot control well. It is rated for flows from 0.25 to 4.4 gallons per minute, which is 15 to 264 gallons per hour. At the top of that range it can feed about 528 drippers rated at 0.5 GPH, or 132 drippers at 2 GPH. Inside, a silicone diaphragm and stainless steel spring react instantly to swings in supply pressure. The outlet stays at a preset 35 psi, so drippers at the head of the line and at the far end see the same pressure. That setting sits comfortably inside the 10 to 45 psi range of Netafim Woodpecker PC drippers. The body is non-corrosive plastic and brass that holds up to the fertilizers and chemicals commonly injected into irrigation water. Both ends are 3/4 inch female threads, so the regulator drops straight into a run of pipe or fittings. The regulating unit is sealed in one piece and is not meant to be serviced. The rubber diaphragm seals tightly, so the body does not weep at the seams. Netafim also offers this low flow body in 15, 20, 25 and 42 psi presets.

Where a 35 psi Pressure Regulator Fits in a Drip Zone

Install the regulator after the zone valve and filter and before the first lateral line. Orient it so water enters the inlet side and leaves toward the laterals. Required inlet pressure equals the preset outlet plus the head loss across the regulator at your flow. Netafim publishes an outlet versus inlet curve for this body measured at 1.3 GPM. Wrap the male fittings with thread seal tape and snug them by hand plus a partial turn. Overtightening a plastic female port can crack it, so stop once the joint stops leaking. On a greenhouse bench, a single unit can run a small bank of pressure compensating drippers off a higher pressure main. Micro sprayers and foggers that want a firm, steady pressure also pair well with this setting. Keep the zone flow inside the rated range, because very low flows below 0.25 GPM fall outside the control curve. For zones that draw more than 4.4 GPM, a full flow body of the same pipe size is the correct choice. Flush the line before installing. Debris lodged against the diaphragm can upset the outlet pressure. Once the system runs, a gauge downstream confirms the outlet is holding at its preset.

Key Features

• Low Flow Range: Regulates accurately from 0.25 to 4.4 GPM (15 to 264 GPH).
• 35 psi Preset: Fixed outlet pressure with no field adjustment needed.
• Inline Female Threads: 3/4 inch female x female threaded connections.
• Silicone Diaphragm: Made for precise control at very low flow.
• Instant Response: Holds outlet pressure steady as inlet pressure changes.
• Chemical Resistant: Non-corrosive plastic and brass body tolerates common fertilizers.
• Sealed Unit: One-piece sealed regulating unit with a stainless steel spring.
• Leak Resistant: Tight diaphragm seal keeps the body from weeping.

Technical Specifications