Rojo Standard or High Flow? Matching the Valve to Your Water Pressure

The Jobe Rojo comes in two versions that look almost identical: the standard valve and the High Flow / Low Pressure version (part codes ending in HF). The difference isn't cosmetic. They're built for different supply pressures, and picking the wrong one can mean slow filling, or a valve running above its rating.

The Two Versions at a Glance

• Standard Rojo: up to about 4 GPM, rated for 0–150 PSI (10 bar).
• Rojo High Flow / Low Pressure (HF): up to about 7 GPM, rated for 0–75 PSI (5 bar).

At the same supply pressure, the HF version passes more water. The trade-off is its lower pressure ceiling. If your supply runs above 75 PSI, the HF version is not the right choice, and the standard valve is.

Start With Your Supply Pressure

Before choosing, find out what pressure actually reaches the valve. Check it with a gauge at the valve location, ideally while water is flowing, not just a single static reading. Then:

• Pressure above 75 PSI: choose the standard Rojo.
• Lower-pressure supply where you want faster filling: the HF version is built for that job, as long as pressure stays within its 75 PSI rating.

The Cartridge Makes the Difference

Jobe notes that the valve can be converted from one pressure rating to the other by changing the inner cartridge. That's also why the service kits differ: the standard Rojo service kit (RJP3A) and the High Flow / Low Pressure service kit (RJP3B) are not interchangeable. Order the kit that matches your valve, and if you ever change cartridges, make sure your supply pressure fits the rating of the one you install.

Don't Forget the Inlet 

Rojo comes with 1/2" and 3/4" inlets, and your flow is always limited by the smallest pipe in your supply line. A 3/4" Rojo on a 1/2" line fills like a 1/2" valve. Match the inlet to your plumbing, and see our sizing guide if you're not sure.

Works With Protect-A-Mount

Both the standard 3/4" Rojo and the 3/4" High Flow version fit the Protect-A-Mount, which shields the valve from livestock contact. See Livestock Are Hard on Trough Valves for how it mounts.

When Rojo Isn't Enough

Even the HF version tops out around 7 GPM. If your trough serves a larger group or refills too slowly, that's the point to look at Topaz or Megaflow. The valve line comparison lays the lines side by side.