First use on or about Feb. 2, 1968; our FLUID MANIFOLDS, originally made from aluminum extrusions of shapes to accommodate one or more pipe tap lines, were produced under the trade name UNIT-HEADER. The trademark was registered Dec. 30, 1969. UNIT-HEADER® has been maintained for over 49 years. Standard products are machined from 1” & 2” standard sch. 40 aluminum and heavy wall 304 & 316 stainless steel, 1” pipe sizes maintained in inventory. Consult Factory for other special non-welded UNIT-HEADER® manifolds.