This single measurement prevents most returns. Do it before you pick a close-coupled or one-piece WC.

First—know your outlet

• S-trap: Outlet goes into the floor (most older homes).
• P-trap: Outlet goes into the wall.

This guide focuses on S-trap (floor outlet) rough-in.

Measure S-trap rough-in (floor outlet)

1. Find the centre of the floor outlet (or the old WC’s outlet).
2. Measure from the finished wall (tiles included) to that centre point.
3. You’ll usually get 220 mm or 305 mm. Note it down.

If your result is odd (e.g., 240 mm), bring a photo and measurement. Some models or adjustable connectors can accommodate; we’ll confirm on-site.

For P-trap (wall outlet)

• Measure from the finished floor to the centre of the wall outlet (height).
• Bring this measurement; we’ll match a compatible P-trap bowl.

Why rough-in matters

• The bowl’s trap must line up with the outlet.
• Choosing the wrong rough-in often means returns or rework.

What else to confirm before you buy

• Seat compatibility: shape & hinge type.
• Cistern/frame: brand family (for wall-hung).
• Water use: look for dual-flush 3/6 L.
• Pressure realities: if showers are low pressure, choose shower hardware accordingly.

Bring your measurement to us

Visit our CERA Style Gallery & Jaquar Display Studio in Thana, Kannur with photos and measurements—we’ll shortlist options that fit first time.