The maximum recommended horizontal clipping distance for 15mm plastic pipework is

• A. 200mm
• B. 300mm
• C. 400mm
• D. 500mm

Answer: (B)

Maintaining a secure, straight run of pipe is essential to prevent movement that can strain joints and create leaks. For 15mm plastic pipe, the pipe is relatively flexible, so it needs regular support to keep it in place as water flows and as the pipe expands and contracts with temperature changes. Placing clips at tight intervals limits deflection between supports, reducing the chance of sag, misalignment at fittings, and wear where the pipe passes through walls or along cupboards. If the run is allowed to span too long a distance between supports, the pipe can bow or rub against clips, which can lead to noise, damage, or leaks over time. Therefore, the recommended maximum horizontal spacing for 15mm plastic pipework is 300 mm, ensuring the run stays properly supported and maintains integrity throughout its length.