Constant Pressure Regulation for Multi-Zone Systems
The Senninger Pressure Limit Valve (PRLV) completely changes the way you design a drip irrigation head assembly. Unlike standard pressure regulators that will break or leak if left under continuous pressure, this specialized limit valve is engineered to operate safely under constant pressure. This means you can install a single Senninger Limit Valve directly onto your mainline upstream of your automated irrigation valves or timers, protecting your entire multi-zone manifold with just one unit instead of needing a separate regulator for every single zone.
Featuring standard 3/4″ Female Pipe Threads (FPT) on both the inlet and outlet, it integrates easily and securely into rigid PVC plumbing. Capable of supporting a wide flow range from 0.5 to 18 Gallons Per Minute (GPM), this commercial-grade valve is available in preset 10, 20, 30, 40, and 50 PSI models to perfectly match the needs of your drip tape, emitters, or micro-sprinklers. Crucial Note: Because the internal mechanisms are designed exclusively for clean water, an irrigation filter MUST be installed upstream (before) this limit valve to prevent debris from damaging it.
- Constant Pressure Rated: Safe to install completely upstream of your automated valves or timers. It is built to hold back continuous mainline pressure 24/7 without bursting.
- Protects Multiple Zones: Because it can sit before your manifold, a single limit valve can regulate the pressure for several downstream zones, saving space and money.
- Wide Flow Range: Accurately drops pressure across a broad flow range of 0.5 to 18 GPM, making it highly versatile for small beds or large crops.
- Multiple PSI Options: Choose from 10, 20, 30, 40, or 50 PSI presets to perfectly match the tolerance of your specific tubing and emitters.
- Standard Pipe Threads: Features 3/4″ FPT inlet and outlet for secure, leak-free integration directly into standard PVC pipe and fittings.
Detailed specifications for system planning.
| Specification | Details |
|---|---|
| Product Type | Pressure Limit Valve (PRLV) |
| Inlet / Outlet Size | 3/4″ Female Pipe Thread (FPT) |
| Required Flow Range | 0.5 to 18 Gallons Per Minute (GPM) |
| Constant Pressure Rated | Yes (Can be installed before valves or timers) |
| Filtration Requirement | Filter MUST be installed upstream (before) the limit valve |
| Brand | Senninger |
Senninger PRLV Model Options
| Regulated Output Pressure | Maximum Inlet Pressure | Flow Range |
|---|---|---|
| 10 PSI | 90 PSI | 0.5 – 18 GPM |
| 20 PSI | 100 PSI | 0.5 – 18 GPM |
| 30 PSI | 110 PSI | 0.5 – 18 GPM |
| 40 PSI | 120 PSI | 0.5 – 18 GPM |
| 50 PSI | 130 PSI | 0.5 – 18 GPM |
Build your constant-pressure head assembly safely and correctly.
Step 1: Install the Filter FIRST
It is absolutely critical that an irrigation filter is installed on your mainline before the Senninger Limit Valve. This valve’s internal mechanism will fail if grit or sand enters it.
Step 2: Prep the Threads
Because this unit utilizes Female Pipe Threads (FPT), you must apply 2 to 3 wraps of Teflon tape to the 3/4″ Male PVC fittings you will be threading into the inlet and outlet. Do not use liquid pipe dope.
Step 3: Connect the Limit Valve
Thread the 3/4″ inlet of the Limit Valve directly into the PVC fitting coming from your filter. Ensure the directional flow arrow points downstream toward your valve manifold.
Step 4: Connect to Your Valves
Thread a 3/4″ PVC fitting into the outlet of the Limit Valve to transition into your multi-zone valve manifold. All automated valves located downstream of this single limit valve will now safely receive regulated pressure.
