Patent ID: 8701553

Claim:
A vat for holding a substance, comprising: a chamber that receives the substance; a valve assembly; said valve assembly including a valve body and a stem; said stem including a valve head having a sealing member connected thereto; said sealing member including at least one readily compressible sealing ring; said valve assembly having an outlet in fluid communication with said chamber; said sealing member including a generally cylindrical first portion having a first diameter and a generally cylindrical second portion having a second diameter; wherein said second diameter is less than said first diameter; said sealing member defining a circumferentially-extending groove interposed between said first portion and said second portion that receives said sealing ring; said sealing member being in fluid communication with outlet and said chamber and selectively operable between a discharge position, for allowing the substance to drain from said chamber, and a closed position, for allowing the substance to remain in the chamber; said sealing member being comprised of one or more polymers; a valve head base that engages said sealing member; said sealing member defining a recess for the lateral receipt of said valve head base; and a slot in communication with said recess for receipt of said stem.