T cells and B cells differ in the form of the antigen they recognize, and this affects which antigens they can detect. B cells bind to antigen on invaders that are found in circulation outside the cells of the body, while T cells detect only invaders that have somehow entered the cells of the body.
ABS, DWV, Solid or Cell Core sewer pipe. The solid pipe is composed of ABS at 99% while the cell core is composed of a cellular foam between 2 layers of ABS which makes the cell core pipe lighter.
Type-S pipe is available with a plain end or an inte-gral bell and spigot system. StormTite â¢ (Bell and Spigot) StormTiteâ¢, PCPPâs 10.8 psi bell and spigot joint systems for Type S pipe has been certified by independent third party laboratories to meet the âwatertightâ requirements defined in ASTM D-3212.