The McAlpine Tunvalve Straight Through (TUN5-CL) is a clear plastic isolation valve engineered for straightforward inline installation in heating and plumbing systems. Its transparent body allows visual inspection of flow and internal condition without dismantling. The straight-through design minimises pressure drop whilst maintaining reliable shut-off capability, making it ideal for system commissioning, maintenance, and emergency isolation. Suitable for use across compatible boiler systems and pipework configurations where quick access and visibility are essential.
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