Turn off both isolation valves beneath the fixture, open the tap to release residual pressure, then dry the area and find where water first appears. A leak at the swivel-spout joint may need a model-matched O-ring or seal; leaks from the mixer body or beneath the mounting point need a licensed plumber. Do not apply silicone around the outside because it will not repair an internal or pressurised leak.
Identify the source
Dry the tap, sink and benchtop, then briefly run the tap and watch where fresh water first appears.
- Swivel-spout joint: Worn, split or flattened spout O-rings are a common cause.
- Mixer body or handle: The fault may be an internal seal, cartridge or cracked tap body.
- Below the mounting point: Check visually for water around the tap body, flexible hoses or connections beneath the sink. Do not dismantle them.
First rule out splashing or water running down from wet hands or the outlet.
Replace an accessible spout seal
Only attempt this if the manufacturer identifies the spout seal as user-serviceable and you can access it without disturbing supply connections or unfamiliar internal components.
- Close the hot and cold isolation valves. If either valve is seized, absent or leaking, do not force it.
- Open the tap and confirm the flow stops. Place a towel or container below the work area.
- Follow the model-specific instructions for removing the spout. Photograph the assembly first, as clips, screws and seal positions vary.
- Replace damaged O-rings with exact, manufacturer-specified parts. Use lubricant only where the instructions specify a potable-water-suitable product.
- Reassemble without scratching sealing surfaces, pinching O-rings or overtightening parts.
- Close the tap, slowly reopen the isolation valves, then check for leaks with the tap both off and running.
If water returns, isolate the supply rather than repeatedly dismantling the tap.
When to call a plumber
Use a licensed plumber if the source is uncertain, isolation is unreliable, the leak is beneath the mounting point, internal parts are inaccessible, or the tap body is cracked or corroded. Professional assessment is also needed when the correct accessible seal does not stop the leak. Licensed plumbers ensure all tapware and sub-bench connections meet AS/NZS 3500.1, the national water services standard governing certified WaterMark components and pressure-safe installations to protect kitchen and bathroom cabinetry from hidden water damage.
Keep the water off if it could reach cabinetry, flooring or electrical equipment. Do not touch wet electrical fittings. If safe isolation or repair is uncertain, contact our licensed Sydney plumbing team for supportive advice. Our team asks targeted pre-dispatch screening questions about your tap design and under-sink setup so our mobile workshop arrives stocked with the exact O-rings, mixer cartridges, and flexible connectors required. Sydney families have trusted Fixed Today since 2011 for honest guidance, a detailed task breakdown, and a $0 call-out fee on approved work.