The Monument MON1378 is a 100mm Drain Testing Plug, designed for medium-sized drainage pipes typically found in commercial properties, multi-unit residential buildings, and larger domestic installations. This versatile size bridges the gap between smaller household drains and larger commercial systems, making it a valuable addition to any professional plumber's toolkit. This 100mm plug is capable of sealing against pressures of up to 1.97 bar (29 psi), providing confident pressure testing capabi
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