Water conditioning tank and liner therefor

Claim 1

A METALLIC TANK AND A LINER THEREFOR INCLUDING A TANK HAVING A HOLLOW CYLINDRICAL BODY WITH A BASE AND A TOP HAVING A LARGE CENTRAL OPENING, A TANK SPUD ATTACHED TO THE TOP OF THE TANK AND HAVING A DEPENDING CYLINDRICAL PROJECTION FITTING WITHIN SAID CENTRAL OPENING IN THE TOP OF THE TANK, THE BOTTOM SURFACE OF SAID PROJECTION FORMING AN EXTENSION OF THE SMOOTH INTERIOR SURFACE OF THE TOP OF THE TANK, SAID TANK SPUD HAVING A CENTRAL OPENING, AN INWARDLY EXTENDING LIP AT THE LOWER END OF THE CENTRAL OPENING FORMING AN ACCESS OPENING WITH SAID LIP DEFINING A FIRST SEALING SURFACE, A FLEXIBLE REMOVABLE LINER CONFORMING TO AND COVERING THE INTERIOR SURFACE OF THE TANK AND HAVING A MOLDED TOP PORTION WITH AN OUTWARDLY EXTENDING FLANGE COVERING THE SEALING SURFACE ON THE LIP OF THE SPUD, AND A TANK ADAPTER HEAD HAVING A BODY PORTION AND A DEPENDING CYLINDRICAL PROJECTION CONFORMABLY RECEIVED WITHIN THE OPENING IN THE TANK SPUD, SAID BODY PORTION INCLUDING A PAIR OF UPWARDLY EXTENDING FITTINGS, A CENTRAL FITTING DEPENDING FROM SAID HEAD INTO THE TANK AND ADAPTED TO BE CONNECTED TO AN OUTLET MANIFOLD, ONE OF SAID UPWARDLY EXTENDING FITTINGS COMMUNICATING WITH SAID CENTRAL DEPENDING FITTING THROUGH A LATERAL PASSAGE, THE REMAINING UPWARDLY EXTENDING FITTING COMMUNICATING WITH AN ANNULAR OPENING SURROUNDING SAID CENTRAL DEPENDING FITTING AND DEFINED BY SAID INWARDLY EXTENDING LIP, AND THE LOWER SURFACE OF THE DEPENDING CYLINDRICAL PROJECTION ON SAID HEAD FORMING A SECOND SEALING SURFACE HAVING SEALING CONTACT WITH AND RESTING ON THE FLANGE OF THE LINER.