Hoffman Specialty Model 79 3/4" Male x 1/2" Female NPT Water Main Vent Valve for Hydronic Heating and Cooling Applications - 401488

The built-in Check ValveA valve that prevents backflow of water into the sump pit from the Discharge Pipe . is a unique feature of Hoffman Specialty air vents, which assures the air you want to eliminate from the system does not get back in when system pressures fall.Brass and stainless steel construction of Hoffman Specialty air vents assures long life in glycol environments, with no chance of material breakdown.Vents up to 850 SCIM. The only vent in this category with published ratings.Seat and Check ValveA valve that prevents backflow of water into the sump pit from the Discharge Pipe . are above the shell, isolated from suspended dirt in the system. Removable seat and Check ValveA valve that prevents backflow of water into the sump pit from the Discharge Pipe . assembly allows quick cleaning or replacement.Equipped with a 1/8" NPT thread, allowing connection of a piped drain where any water leakage is unacceptable.Supplied with both 1/2" female and 3/4" male NPT connections for great flexibility in application and installationHoffman Specialty Vents come with one feature unmatched by any other supplier, your local Bell & Gossett Representative. Your representative can provide the assistance to make certain your entire system will perform as expected.To be used for systems with maximum operating pressures up to 75 psi .tooltip { cursor: pointer; text-decoration: underline; position: relative; } .tooltiptext { visibility: hidden; width: 220px; background-color: #333; color: #fff; text-align: center; border-radius: 5px; padding: 8px; font-size: 14px; position: absolute; z-index: 1; bottom: 125%; left: 50%; margin-left: -110px; opacity: 0; transition: opacity 0.3s; white-space: normal; line-height: 1.4; } .tooltip:hover .tooltiptext { visibility: visible; opacity: 1; }

• Designed for use on hot water, cold water, or glycol water mains (with specific gravity above 0.7), this vent valve is effective in hydronic and process water systems.
• Constructed with a dependable cast brass body, the valve features a built-in check valve and a pneumatic bell mechanism to safely discharge moisture and air from the system.
• Offers easy installation with a 1/2″ NPT female inlet and 3/4″ NPT male straight shank outlet, along with a removable top tapped for a 1/8″ NPT safety drain connection.
• Rated for a maximum operating pressure of 75 psi (with a hydrostatic limit of 200 psi) and suitable for temperatures up to 250 F.