Roca The Gap Rimless Wall Hung WC Pan

In-Depth Look

The shift from rimmed to rimless toilets has been one of the most significant changes in UK bathroom design. The Roca Gap Rimless is the model that many plumbers and bathroom installers now recommend as standard.

Rimless Advantage

Traditional toilet pans have an internal rim with holes that direct water around the bowl during flushing. This rim is a hidden surface that is difficult to clean and becomes a breeding ground for bacteria and limescale. The rimless design replaces this with a direct flush system that washes the entire bowl surface, leaving nowhere for dirt to hide.

Wall Hung Installation

Wall hung installation raises the WC off the floor, creating clear space beneath for cleaning. The cistern is concealed behind the wall in a supporting frame, which also means a quieter flush and a cleaner visual appearance. The combination of rimless bowl and wall hung installation creates the cleanest possible bathroom layout.

Verdict

The Roca Gap Rimless is the WC pan that delivers both form and function. The rimless bowl is genuinely easier to keep clean, the wall hung installation looks contemporary and simplifies floor cleaning, and the Roca build quality ensures long-term performance.

How It Compares

The Roca The Gap Rimless is a wall hung WC pan with no internal rim, made from vitreous china and measuring 540mm in projection and 346mm in width. Wall hung means the pan is fixed to a supporting frame inside the wall rather than standing on the floor, which leaves clear space underneath for cleaning.

Other manufacturers offer similar rimless wall hung pans. Vitra’s S20 range and the Villeroy & Boch ONovo are well-known examples. Pan shapes, projections and fixing details differ between brands, so measure your space and check the dimensions on any alternative before you commit. The Roca product file describes the pan as compatible with standard concealed cistern frames, which suits the common combinations installers use.

The frame is a separate and important choice. Geberit and Grohe both make concealed frames, and this site covers the Grohe Rapid SL WC frame as a matching component. The pan, the frame, the flush plate and the seat all need to work together, so check that the pan’s fixing points suit the frame you buy. The product file notes that the frame and the seat are both sold separately.

The alternative to wall hung is a close-coupled WC, where the cistern sits on the back of the pan and the whole thing stands on the floor. Close-coupled toilets are simpler to fit because no frame is needed. The wall hung choice gives a cleaner look and an easier floor to clean, but takes more planning and installation work, as the file’s cons confirm.

The Roca’s rimless design replaces the traditional rim with a direct flush that washes the whole bowl, per the file. If you want a modern, easy to clean bathroom and are happy to build the frame into the wall, it is a strong choice. If you are short of time or installation space, a close-coupled pan is simpler.

Common Questions

What frame, flush plate and seat do I need to buy separately? You need a concealed cistern frame designed for wall hung pans, a flush plate that matches the frame, and a toilet seat, since the file says the seat is sold separately. Check that the seat fits the pan’s shape and the hinge fixings. The Grohe Rapid SL frame is one option featured on this site. Confirm compatibility with the frame maker.

How much weight can a wall hung WC take? The product file does not give a figure. The load rating is set by the frame and the pan together, so check the frame and Roca data sheets for the stated limit. Frames are fixed to the floor and wall structure, and the installation must follow the instructions. If someone heavy will use it, ask your installer to confirm the rating.

Does rimless really flush better, or do I need a stronger flush? The file says the direct flush washes the entire bowl surface, leaving nowhere for dirt to hide. How well it works also depends on the cistern and frame, which control the flush volume. Follow the frame’s flush settings and installation guidance. If you have concerns, discuss them with your installer.

How high should I mount it? The frame’s instructions set the mounting height, and most frames allow adjustment. Think about who will use it, including children, older people or anyone with limited mobility, and discuss comfort with your installer before the wall is closed up. Once the frame is boarded and tiled, changing the height is difficult.