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8″-12″ (200-300mm) PVC Drain Bag. Used when testing or during maintenance on drainage / sewer work. Easily inflates using standard air pump with fitted schrader valve (as vehicle tyres etc..). To create an air tight seal in pipes for a back pressure of 4″/100mm U Gauge, as requested by British Standards. Easily inflated for trouble free pipe sealing. Ideal for use in areas where access is smaller than the test diameter. 1.2m Fitted Hose.
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