Quick answer
A leaking spray gun usually means the o-ring between the body and pattern selector is worn or dry. Replacing it and applying silicone lubricant typically solves the leak.
Why leaks happen at the selector dial
The most common leak point on a metal spray gun is where the pattern selector dial meets the gun body. That seal relies on a small o-ring that compresses when the dial is turned. Over time, the o-ring can dry out, crack, or get pinched out of place.
If you see water seeping from the dial area when the trigger is pulled, the o-ring is the likely culprit. A quick visual check can confirm—look for moisture or drips around the selector ring.
When a simple lubricant might be enough
Sometimes the o-ring is still intact but has lost its flexibility. In that case, applying a few drops of silicone lubricant can restore the seal without needing to replace the o-ring. This is a faster fix and works well if the leak is minor or intermittent.
For example, Hoselink's Spray Gun Lubricant is designed for this exact purpose. It comes in a tube, so you can apply it directly to the o-ring area. A periodic application keeps the trigger and selector working smoothly.
Tools and parts you may need
To fix the leak, you'll likely need a replacement o-ring and some lubricant. The O-Rings & Lubricant Pack for Face of 7-Function Spray Gun includes two spray head o-rings and a tube of lubricant, making it a convenient all-in-one solution.
If you already have lubricant, you can buy just the o-rings separately. Check your spray gun model—the pack is compatible with Hoselink's Premium 7-Function Spray Gun (item 5528).
Diagnose and fix your spray gun leak
- Symptom: Water leaks from the pattern selector dial when the trigger is pulled, or the trigger feels stiff and hard to squeeze.
- Likely cause: The o-ring between the metal spray gun body and the pattern selector dial is worn, dry, or displaced. Lack of lubrication can also cause the trigger to stick.
- Corrective action: First, try applying a few drops of silicone lubricant to the o-ring area. If the leak persists, replace the o-ring: remove the selector dial, take out the old o-ring, install the new one (from the O-Rings & Lubricant Pack), and reassemble. Apply lubricant to the new o-ring before reassembly. If the o-ring is visibly cracked or flattened, replacement is necessary—lubricant alone won't fix it.
- When to stop or choose another option: If the leak comes from the hose connection or trigger assembly, or if the spray gun body is cracked, replacing the o-ring won't help. In those cases, check the hose washer or consider replacing the spray gun. Stop disassembly if you see cracks in the metal body or if water leaks from the trigger shaft—those require a different repair or replacement.
Products that help
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O-Rings & Lubricant Pack for Face of 7-Function Spray Gun: Includes two spray head o-rings and lubricant for the 7-Function Spray Gun. This pack gives you everything needed to fix a leaking selector dial in one purchase, saving a second trip.
O-Rings & Lubricant Pack for Face of 7-Function Spray Gun
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Spray Gun Lubricant: Silicone lubricant in a tube, designed for Hoselink metal spray guns. A few drops can revive dried o-rings and keep the trigger mechanism operating smoothly without disassembly.
Spray Gun Lubricant