Head Pressure

High Head Pressure: What's Happening & How to Fix It

The problem:

High head pressure is one of the most common reasons a pneumatic pump stalls, and one of the most damaging. A pump that stalls under pressure doesn't just stop working; it can continue pushing unwanted air into your force main until someone catches it.

Why traditional pumps struggle:

Most pneumatic pumps, diaphragm and piston-style alike, rely on a simple balance of forces to operate. Compressed air pushes against a diaphragm or piston to displace liquid, generally on a roughly 1:1 pressure ratio, meaning incoming air pressure has to overcome the fluid pressure pushing back. When head pressure climbs too high, whether from vertical lift, friction losses in long force mains, or partially clogged lines, that balance breaks down:

The cycle can't complete

Air pressure can no longer push the diaphragm or piston through its full travel distance.

The internal valve freezes mid-cycle

Because the stroke never finishes, the pilot valve that controls air intake and exhaust never reaches the position it needs to toggle, and the pump stalls completely.

Air keeps flowing

With the valve stuck, many pumps continue pushing air into the force main even though they're no longer moving liquid, turning one problem into two.

How the Jeneer Ultra X handles it:

The Ultra X is affected by high head pressure too. No pump is immune to it. But because the Ultra X doesn't rely on mechanical valves that can physically stick open, it responds differently:

It shuts itself off, rather than staying stuck open

Instead of stalling with the valve open, the Ultra X detects the failed cycle and turns off the air supply, stopping unwanted air from entering the force main. Learn more about pump timeouts →here.

It keeps trying automatically

Once in timeout, the pump attempts to restart and cycle every 20 minutes. If head pressure has dropped enough to clear the pump, it resumes normal cycling on its own, with no manual reset and no bumping.

Air settings can be adjusted

In some conditions, increasing how long air is supplied to the pump can help it push through higher head pressure. We don't recommend exceeding 30 seconds. Persistent high head pressure is usually a sign of a larger issue elsewhere in the system, and worth investigating on its own. Watch: liquid/foam at the exhaust valve → here.

High head pressure doesn't have to mean unwanted air in your force main

Every site's head pressure conditions are different. Talk to our team about what's happening in your wellfield.

Talk to an Expert