Soakaway Container for use with limestone chippings. 110mmØ x 300mm x 1¼" (1.1/4")/32mm Pipe Inlet Connection Standard: BS 6798:2009 and Building Regulations Approved Document H Please Note: Container for use with limestone chippings, receives discharge from condensing boiler. For external use only. 19/23mm x 32mm solvent weld Fitting provided to increase size of discharge pipe before it passes through the external wall.