It refers to a sanitary seal, which includes: (a) sleeves; (b) one or more rings arranged around a sleeve, They are added to the sleeves in a removable manner to provide a means of removing one or more rings to adjust the position of the seal on adjacent tubes; and (c) a sealing device including a flexible pop-up portion, If you are already registered, please log in first. It also mentions a method of sealing the discharge from a pipe fitting to a sewer outlet
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