Vented loops are to prevent back siphoning from water systems that lead to the outside. You need vented loops (anti-siphon valves) or should have them, as part of an engine exhaust system, or plumbing for bilge pumps, or the marine …
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Vented loops are to prevent back siphoning from water systems that lead to the outside. You need vented loops (anti-siphon valves) or should have them, as part of an engine exhaust system, or plumbing for bilge pumps, or the marine …