Key risks

• Leaks and flooding due to incorrect installation, wrong orientation or poor sealing.
• Backflow of potentially contaminated water into the system if the valve fails or a blockage occurs.
• Water hammer, noise and vibrations from abrupt closure or rapid opening of the flow.
• Injury from opening connections under pressure or from contact with hot water.
• Damage to pumps, heaters or meters if the valve jams or is installed in the wrong direction.
• Corrosion, cracking or rupture due to use with incompatible fluids, pressures or temperatures.

Safe use

• Verify compatibility with the fluid, operating temperature and pressure of the system, and always follow the manufacturer’s instructions.
• Isolate the supply, depressurise and drain the pipework before installing, inspecting or removing the valve.
• Observe the flow direction indicated on the body and the permitted mounting position for the model.
• Use compatible sealing materials and gaskets; do not overtighten to avoid cracking or deforming the threads.
• Keep connections clean and free of particles; if the system carries solids, fit an upstream filter/strainer.
• Open the supply gradually and check for leaks; monitor for abnormal noises or vibrations after start-up.
• Do not modify the body or the internal mechanism, and do not lock the valve in the open or closed position.

Storage and maintenance

• Store valves in a dry, clean place protected from impacts, dust and frost; keep protective caps in place until installation.
• Avoid prolonged exposure to the elements or direct sunlight that may degrade seals and plastic components.
• Before installation, ensure the interior is free from dirt, swarf or packaging debris.
• Carry out periodic inspections to detect leaks, corrosion, scaling or loss of flow; remove deposits in accordance with the manufacturer’s instructions.
• In hard-water areas, plan regular descaling and use appropriate filtration to reduce deposits.
• Replace gaskets or the valve if there is wear, sticking, visible corrosion or damaged threads.
• Before any maintenance work, isolate and depressurise the system.

Restrictions on use

• Do not use the valve outside the ranges specified by the manufacturer (pressure, temperature and fluid type).
• Do not use it with gas, fuels, steam or drinking water unless the model is specifically approved for that purpose.
• Do not use the valve as a full shut-off device or as a primary safety device or high-hazard sanitary backflow prevention component.
• Do not install it buried or concealed without access for inspection and maintenance.
• Do not use it with fluids containing abrasive particles without suitable upstream filtration.
• Do not paint or coat the mechanism in a way that could impede internal movement.
• Do not reuse valves that are damaged, deformed or have damaged threads.