Plumbing Africa July 2026 | Página 45

TECHNICAL 43

All images supplied by Splashworks and Open Source

To finish the installation, a neat bead of silicone sealant is applied around the base of the toilet. This serves as a protective barrier against water seeping underneath and also adds a final layer of stability. The cistern, if separate, is then attached, and the water supply is connected. After opening the valve, a few test flushes will confirm whether everything is functioning correctly and free of leaks.

While the correct method is relatively simple, it’ s equally important to understand what not to do. One common mistake is attempting to fix the toilet to the floor using mortar. Although it may seem like a solid solution, mortar is actually unsuitable for this purpose.

The main issue with mortar is its rigidity. Toilets and floors naturally expand and shift slightly over time due to temperature changes and regular use. Because mortar cannot accommodate this movement, it tends to crack or loosen, and in some cases, it can even damage the toilet itself. Additionally, using mortar makes future repairs

Mounting holes

extremely difficult. If the toilet ever needs to be replaced or if a leak develops, removing a mortared unit often results in broken fixtures and damaged flooring.

Mortar also performs poorly as a seal. It is neither flexible nor reliably waterproof, meaning it cannot provide the same protection as a wax ring or rubber seal. Over time, it may allow small leaks to develop, and because it can absorb moisture, it may contribute to unpleasant odours, staining and even bacterial growth around the base of the toilet.

Modern toilets are specifically designed to be installed using mechanical fixings combined with flexible seals. These components work together to provide stability, adaptability and a reliable seal. By bypassing them and using mortar instead, the installation is compromised from the start.

In the end, the best approach is also the simplest: secure the toilet with proper anchors, ensure it is level, and use a flexible seal to prevent leaks. This method not only results in a more durable installation but also makes future maintenance far easier. A properly installed toilet is stable, hygienic and built to last – without unnecessary complications down the line. PA

Need help or advice? For professional guidance or assistance with your system design, feel free to contact: Patrick Gordon | 083 303 1437 | patrickg @ splashworks. co. za

Do you have a technical question? Please email your technical questions to megan @ interactmedia. co. za, with the subject line‘ technical question’.

“ Modern toilets are specifically designed to be installed using mechanical fixings combined with flexible seals.”

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