The Groco HVL Vented Loop allows air to enter to break siphon, but does not permit air and odors to escape. This series of vented loops assures clog-free, anti-siphon protection for sanitation or engine exhaust systems. The oversized vent valve can easily be removed for inspection or cleaning without tools. The cap is threaded 1/2" NPT to accept a barb fitting if you wish to vent overboard. Overboard venting is required if this HVL loop is used in an exhaust system.
Specifications:
| Part Number | Hose ID | Thread NPT | A | B | C |
| HVL-750 | 3/4" | - | 4.75" | 4.3" | 3.0" |
| HVL-1000 | 1" | 1" | 4.75" | 4.3" | 3.0" |
| HVL-1500 | 1-1/2" | 1-1/2" | 6.7" | 4.8" | 4.0" |
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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