GROCO Bronze Vented Loop - 2" Hose

The GROCO Bronze Vented Loop with 2" hose is a marine-grade anti-siphon valve engineered to protect both sanitation and engine exhaust systems from unwanted siphoning and odor escape. This vented loop allows critical air ingress to break siphon conditions while the oversized vent valve prevents air and odors from escaping the system—a critical distinction for onboard systems where odor control and functionality cannot be compromised.

The 2" hose diameter accommodates mid-range flow requirements typical of cruising and fishing vessels. Bronze construction delivers superior corrosion resistance in saltwater and freshwater environments, maintaining structural integrity and valve function over extended service life. The threaded 1/2" NPT cap accepts barbed fittings for optional overboard venting when the vented loop is integrated into an exhaust system, meeting marine industry standards for proper discharge configuration. The oversized vent design eliminates clogging risk—a common failure point in smaller-diameter anti-siphon devices.

This product serves liveaboard cruisers, commercial fishing operations, and serious recreational boaters who prioritize system reliability and odor management. The GROCO HVL series is specified in new marine builds and retrofit installations where exhaust and sanitation system integrity cannot fail. Installation requires proper sizing to vessel flow rates and discharge location planning; overboard venting compliance depends on local regulations and vessel configuration. Bronze vented loops represent a proven approach to siphon protection and are preferred by experienced marine technicians over lower-cost alternatives that sacrifice reliability or corrosion resistance.