Wilco Inwall Cistern Inlet Valve

• Signs you need to replace your Wilco Inlet Valve: The inlet valve is responsible for refilling your cistern after every flush. It’s time for a replacement if you notice:

  • Whistling or Vibrating: High-pitched noises while the tank is refilling.

  • Slow Filling: The cistern takes several minutes to fill back up.

  • Overfilling: The valve fails to shut off, causing water to constantly run into the toilet bowl through the internal overflow pipe.

  • The 15mm Rule: This valve features a 1/2″ (15mm) threaded connection—the standard size for most generic and import in-wall suites.

Genuine Wilco 1/2″ Side-Entry Inlet Valve If your toilet is making noise or won’t stop running, you don’t necessarily need a whole new cistern. The Wilco 1/2″ inlet valve is a trade-quality solution designed to replace failed valves in a wide variety of “No-Name” or “Import” in-wall cistern packages.

Why professionals choose this valve:

• Quiet Operation: Specifically engineered to reduce the “water hammer” and whistling noises common in older valves.

• Precise Shut-Off: Prevents the cistern from overfilling, which saves water and prevents constant “ghost flushing” into the pan.

• Compact Footprint: Fits comfortably inside the narrow access windows of modern in-wall frames.

Direct Answer FAQ

• Q: Is 1/2 inch the same as 15mm?

  • A: Yes. In Australian plumbing terminology, 1/2″ and 15mm are interchangeable for this type of thread.

• Q: Will this stop water from running into my toilet bowl?

  • A: If the water is running into the bowl because the cistern is too full (overfilling), then yes, this is the fix. If the cistern is empty or low and still leaking, you need an Outlet Valve Washer.

• Q: Can I use this in a Geberit cistern?

  • A: No. Geberit systems require specialized valves. This Wilco valve is for generic/import in-wall cisterns often used by brands like Fienza or Inspire.

Skip the big-box queues: We have the Wilco 1/2″ valve in stock right now at 1263 Botany Rd, Mascot. Plumbers prefer us because we know exactly which generic suites this part fits, ensuring you don’t have to make a second trip.