Total Price:
Add to CartThe 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" |
What is the Groco HVL Bronze Vented Loop used for?
The Groco HVL Bronze Vented Loop is designed to provide anti-siphon protection for sanitation or engine exhaust systems. It allows air to enter and break a siphon while preventing air and odors from escaping. The vented loop is designed for clog-free operation and includes an oversized vent valve.
How does the Groco HVL Vented Loop break a siphon?
The Groco HVL Vented Loop allows air to enter the system to break a siphon while preventing air and odors from escaping. If the loop is used in an engine exhaust system, overboard venting is required.
Can the Groco HVL Vented Loop valve be removed for cleaning?
Yes. The oversized vent valve can be removed without tools for inspection or cleaning. This design provides access to the valve without requiring additional tools for removal.
What is the threaded cap size on the Groco HVL Vented Loop?
The Groco HVL Vented Loop has a threaded 1/2" NPT cap. The cap can accept a barb fitting if you want to vent the loop overboard. Overboard venting is required when the HVL loop is used in an exhaust system.
What hose sizes are available for the Groco HVL Vented Loop?
The Groco HVL series is available for 3/4", 1", and 1-1/2" hose inside diameters. The HVL-750 is for 3/4" hose, the HVL-1000 is for 1" hose, and the HVL-1500 is for 1-1/2" hose. Verify the part number against your hose size before ordering.
Does the Groco HVL Vented Loop include mounting hardware?
Yes. Mounting hardware is included with the Groco HVL Vented Loop. The series is available in multiple hose sizes, so verify the appropriate model and dimensions for your installation before purchasing.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Groco NPT Bronze 45 Degree Pipe to Hose Fitting The Groco PTHD 45 Degree Pipe to Hose Fitting is a 45 degree, standard flow fitting with a male NPT x hose connection. This fitting is constructed of...
Choose Options
Groco Bronze Pipe Nipple Groco's PN Series cast bronze pipe nipples provide exact alloy compatibility for making inter-connections between numerous marine components such as seacocks, strainers, and...
Choose Options
Groco TH Series Standard Length Bronze Thru Hull w/ Nut Groco TH Series Thru Hulls are constructed of C83600 bronze and feature a NPSM / NPT combination thread. These thru hulls are available in a...
Choose Options
Groco Pipe to Hose Bronze Fitting Groco bronze Pipe to hose fitting. Standard Flow - the hose ID is the same as the pipe size (ie: PTH-750 has 3/4" NPT pipe thread and accepts 3/4" ID hose)...
Choose Options
Groco Bronze Hose Thru-Hull Fitting Groco bronze thru-hull fittings are constructed of durable C83600 bronze and are available in a range of sizes. NPS thread with hose connection UL Listed...
Choose Options