Quality full union full flow ball valve. 2 inch valves are reasonable price. No need for valves on manifold for adjusting flow if you want a shut off near wall. Returns are seldom adjusted after initial setup. If designed into layout close to entry with access initially there is no need for valve access on manifold or doubling of valves. With pond water and potential build up, any type of check valve would be a high potential failure point if used as a complete shut off.
Last edited by batman; 01-12-2021 at 11:35 AM.
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