Hoselink Spray Gun Repair Set: Fix a Leaking Sprayer Yourself

Quick answer

To fix a leaking Hoselink spray gun, first confirm your model number, then replace the worn internal seals and plunger using the Spray Gun Spare Parts Repair Set. This kit suits the Premium 7-Function Spray Gun and addresses common leaks and trigger issues. The plunger included fits model 5528 only, so check your handle before ordering.

Identify your spray gun model before you start

The plunger in the repair set is designed for model 5528, which has the trigger lock at the base of the handle. It is not compatible with the earlier 5527 model, where the trigger sits mid-way on the handle. Other components in the kit fit both models, so the plunger is the only part you need to check. Look for a trigger lock at the bottom of the handle to confirm you have a 5528.

Gather your tools and work over a tray

You will need a small Phillips-head screwdriver and a clean cloth. Work over a tray or bowl so small springs and seals do not roll away. Before disassembly, turn off the tap and squeeze the trigger to release any remaining water pressure.

Disassemble the spray gun carefully

Remove the screws holding the two halves of the spray gun body together. Gently pull the halves apart, keeping the internal components in place. Take a photo before removing anything so you can reassemble in the correct order. The most common mistake is forcing the halves apart and losing the small spring that sits behind the trigger.

Replace the worn seals and plunger

Inspect the old O-rings and seals for cracks or flattening. Remove them with a small flat-head screwdriver or your fingernail, taking care not to scratch the plastic housing. Fit the new seals from the repair set, then replace the plunger if you have a 5528 model. A common error is fitting the plunger backwards; the wider end should face the trigger mechanism.

Reassemble and test for leaks

Align the two halves of the spray gun body and press them together without forcing. Reinsert the screws and tighten them evenly in a cross pattern. Reconnect the hose, turn on the tap, and test all seven spray functions. If you still see drips, check that the seals are seated flat and the screws are snug but not over-tightened.

Step-by-step spray gun repair

1. Confirm your model: Look for the trigger lock position: base of handle = 5528, mid-handle = 5527. The plunger in the kit only fits 5528. If you have a 5527, the plunger won't fit, but the other seals will.
2. Shut off water and release pressure: Turn off the tap and squeeze the trigger to drain residual water before disassembly. Skipping this step can cause a sudden spray when you open the gun.
3. Open the housing over a tray: Remove screws and separate the two halves. Keep small parts contained. Work over a tray to avoid losing springs or seals.
4. Swap the seals and plunger: Replace all worn O-rings and seals. If you have a 5528, fit the new plunger with the wider end facing the trigger. A backwards plunger will cause trigger sticking or leaks.
5. Reassemble and test: Press halves together, tighten screws evenly, and test all spray settings with water on. If leaks persist, reseat the seals and check screw tension.

Product facts

• Spray Gun Spare Parts Repair Set: Spray Gun Spare Parts Repair Set includes a plunger suitable only for model 5528 (trigger lock at base of handle) and not for model 5527 (trigger located mid-way on handle). Other components suit both models. Check your model first; if you have a 5527, you can still use the seals and other parts but not the plunger.