Generic Valve Non Return For 150Lt
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For a 150-litre hot water cylinder (geyser) or standard domestic/light-commercial water system, a non-return valve typically requires a 15mm or 22mm (1/2" or 3/4") connection size—not a 150mm industrial valve (which is vastly larger and meant for heavy pipeline or municipal/industrial flow).
Key Details & Options
• Domestic Geyser Size (150Lt): Standard South African 150-litre electric water heaters use a 15mm or 22mm pressure control valve / non-return valve combination (part of the Líz /setter or safety valve kit) rather than a standalone industrial DN150 (150mm) valve.
• If you meant a 15mm/22mm Spring/Check Valve: Small brass spring-loaded or swing check valves are widely available from local plumbing and irrigation suppliers like Agrinet Check Valves (featuring brands like Torrenti in sizes from 15mm to 100mm) or general hardware stockists.
• If you literally meant DN 150mm (150 mm diameter pipe): Industrial options include cast iron or ductile iron wafer/swing non-return valves like the Macsteel Non-return Valve Catalog or SuperPump Swing Flanged Non-Return Valve, which are built for large-scale water or wastewater lines