The 100mm bailey drain test plug with brass cap is the ideal solution for testing smaller diameter drainage systems. This compact plug features centre locking design with steel plates, steel wing nuts and a brass blanking cap, making it perfect for domestic drainage work and smaller commercial applications where precise sealing is essential. The 100mm size is commonly used for standard household waste pipes and building drains, providing a secure seal for both air and water testing procedures. The combination of steel construction with brass components ensures durability whilst the brass cap offers superior corrosion resistance during repeated testing cycles. Features and benefits bull 100mm size ideal for standard domestic drainage systems bull steel plates and wing nuts provide robust structural integrity bull brass blanking cap resists corrosion for extended service life bull centre locking mechanism ensures even pressure distribution bull suitable for both air and water testing applications bull compact size allows easy handling and storage specifications tool type drain test plug size 100mm 4in