Check the listing for details. Apollo 6 inch backflow preventer valve new. Condition: New, Made in United States. Listed at 2800.00 USD. The Apollo 6-inch backflow preventer is a Double Check Assembly (DCA) designed for manual valve operation. Made in the United States, this unit is suitable for water media and has a pipe size of 6 inches. With a unit quantity of 1, this backflow preventer is essential for ensuring water quality and preventing cross-contamination in various industrial and commercial applications. Its reliable brand reputation and specific design make it a valuable addition to any plumbing system. Buyer pays shipping. Will only charge 40 dollars over actual shipping for handling. Will provide receipt of shipping showing cost plus 40 dollars for handling.