How to Repair a Pressure Washer Lance: Fix Leaks, Low Pressure, and More

Start With the Failure, Not the Tool

Before touching a wrench, look at the symptom. A lance fails at a specific point, and that point tells you where to investigate. The table below summarizes the patterns you will meet in the field.

One rule applies before you begin any repair: a pressure-washer system stores energy even after shutdown. Complete the depressurization sequence described in the safety section before loosening anything.

A Shower Instead of a Stream: Clean or Replace the Nozzle

A lance that produces a wide, fragmented pattern, or a stream that fades within seconds, is usually telling you that the nozzle is partially blocked. Scale from hard water, grit from the surface, or rust from the supply hose lodges in the orifice and breaks up the jet.

1. Remove the nozzle from the lance.
2. Push a nozzle-cleaning pin — or a thin paperclip — through the orifice.
3. If it resists, soak the nozzle for 15-20 minutes in a mild descaling solution.
4. Reassemble and check the spray pattern at low pressure.

If the pattern stays uneven after cleaning, the orifice is worn. Eroded brass nozzles waste pressure even when the pump is healthy, so replace the tip instead of living with a poor spray. A 25-degree tip suits general washing, a 40-degree tip is gentler for painted surfaces, and a turbo pattern adds impact for stubborn grime; choose the angle that matches the task.

25-Degree Quick Connect Spray Nozzle for Pressure WashersA 25-degree quick-connect nozzle provides a general-purpose spray pattern suited for routine washing. Consider this tip when replacing a worn orifice to restore even pressure and consistent cleaning performance.View Product →

When the Structure Is Damaged, Replacement Is the Answer

Two situations are beyond repair: a bent barrel and a corroded one. A bent barrel stresses the swivel joint and the nozzle seat, invites leaks, and cannot be straightened reliably by hand. Corrosion pitting means the wall thickness is no longer what the designer intended, and no surface treatment restores it.

Replacement is also right when the cost of parts and labor approaches half the price of a new lance. A sealed new barrel delivers predictable performance, and a manufacturer that builds these parts at scale is more likely to hold consistent wall thickness and clean threads than a random spare part — exactly what matters in a component that works at high pressure.

For domestic repairs, a well-made chrome-plated or galvanized steel barrel is the economical choice. For operators using aggressive chemicals, working near salt air, or running a machine daily, stainless steel earns its higher price by lasting longer.

Galvanized Straight-Head Spray Gun BarrelThis galvanized steel barrel offers corrosion resistance and durability at a practical cost. It suits domestic repairs where chrome-plated or galvanized parts are preferred, delivering reliable performance without the expense of stainless steel.View Product →

Stainless Steel Spray Gun Straight TubeA precision-polished stainless steel straight tube that withstands abrasive and chemical exposure. It is a worthwhile upgrade for operators using aggressive chemicals or running machines daily, providing long-term structural integrity and corrosion resistance.View Product →

The Takeaway: Repair Small Parts, Replace Structural Ones, Test Everything

Follow the same sequence every time: depressurize, identify the symptom, restore the seal or the nozzle, respect the threads, and replace the barrel only when the structure is compromised.

Most of these repairs cost a few dollars in parts and under an hour of time. The exceptions — bent barrels, deep corrosion, significant thread damage — are exactly where an affordable replacement is the professional's choice. Repair the serviceable, replace the doubtful, and confirm every fix at low pressure before returning the machine to full output.