Current Selected Location - Sid Harvey Garden City (0999) Garden City NY

The HAV valve utilizes moisture retaining discs within the body which vary in volume when they change from a wet to a dry condition. As the discs dry, they allow air to escape from the system and when wet, provide a positive shut-off.

Automatic or manual operation
• Quick venting design
• Positive shut-off ball check
• Heat resistant hand wheel
• Simple two piece construction
• Non adjustable
• Straight mount
• Straight body style

Series DuoVent High Capacity Air Vents with Manual Vent Feature are used in commercial and residential hydronic heating applications to provide automatic air venting for hot or cold water distribution systems. It consists of a brass body construction with female NPT connection, brass cover, air vent with silicone rubber seal, shutter, polyethylene float with valve plug, automatic vent with black cap, and manual vent with red cap. Series DuoVent has a high capacity and high temperature rating and is ideal for use with glycol systems or for use as an anti-vacuum device. Can be disassembled for inspection and cleaning.

Air vent with silicone rubber seal
• Impurities do not usually affect function as maximum float line of water is always lower than the valve seal
• Float is high temperature resistant polyethylene
• Suitable for use with glycol systems
• With manual vent feature
  

Watts Water 740 Pressure Relief Valve, 3/4", FNPT, 30 psi, Iron

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This 3/4" heavy duty mechanical float valve is used in commercial, industrial, and agricultural applications for controlling high capacity water flow and can be tank wall-mounted. It is ideal for use in air conditioning, refrigeration, and irrigation systems. This valve has a bronze body with a machine flange on the inlet side with 3/4" female NPT pipe threaded inlet connection and male straight-pipe threaded for locknut outlet connection. It has serrated arms for easy adjustment of water level, bronze long and short arms, replaceable seals, and no-jam single lever action. The maximum pressure is 165 psi (11.4 bar).Watts Water 750

3/4"
• Bronze
• Inlet Pressure-PSI 50,
  

Watts Regulators series 740 boiler pressure relief valves are used in hot water space heating boiler applications to protect against excessive pressure on all types of hot water space heating boiler equipment. It consists of a iron body construction with expanded outlet drain connections for hot water space heating boilers, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 740 offers large discharge capacity, resists corrosive water conditions, resists sticking and freezing, and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief and shall not be used as an operating control.

Iron body with expanded outlets for hot water space heating boilers
• Seat located above drain, water can't be trapped and sediment can't foul seat
• Non-mechanical seat-to-disc alignment will not stick or freeze
• Each hot water space heating boiler shall be equipped with a pressure relief valve set to relieve below the maximum boiler working pressure
• Water seal of high temperature resisting material isolates spring working parts from water during relief
  

Watts Water 740-030-FS-3/4 Pressure Relief Valve 3/4" FPT x 1" FPT 30 psi

Watts 9DM3-S Forged Brass Dual Check Backflow Preventer with Intermediate Atmospheric Vent, 1/2", Female Union

It prevent the reverse flow of hot or cold polluted water from entering into the potable water supply
• It consists of a brass body with stainless steel internal parts, integral strainer, and two durable, tight-sealing, rubber check valves
• For continuous pressure, non-health hazard applications in smaller supply lines
• It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing
• A secondary check valve utilizes a rubber disc-to-metal seating
• In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system
• True line-sized construction allows the check modules to open further allowing dirt and debris to pass more freely reducing check fouling
• Maximum flow at low pressure drop
• Furnished with union connections to facilitate removal and replacement for maintenance
• Compact for economy combined with performance
• Design simplicity for easy maintenance
• Can be installed vertically or horizontally