www.thedriller.com/articles/84783-new-insert-fittings
New Insert Fittings
April 1, 2007

New all-stainless steel insert fittings for poly pipe from Merrill Manufacturing are available from 3⁄4-inch through 2-inch sizes in male adapters and insert couplings. These fittings are constructed from 304 stainless steel material with a completely round configuration. These fittings are in stock and available for immediate delivery.
Merrill Manufacturing, Card No. 175