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

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Watts Water 590719

Watts Water 590719

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

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590712

590712

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

740-030-FS-3/4

VentRite 75VT Brass Non-Adjustable Air Valve, 3/4 x 1/2", Male x Female

• All vents are factory assembled, tested and inspected in the USA
• Each vent is individually packed with external labeling for convenience and maintenance
• Our vents have all brass internals with nickel plated and hand polished exterior
• Every Vent-Rite vent is factory assembled, tested and inspected in the USA

Sid Harvey Item #:75VT: Replaces Part #:'s : 2K903
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Vent-Rite Corporation 75VT

Vent-Rite Corporation 75VT

Webstone Valve 75003 Air Separator 3/4" Sweat

75003

75003

VentRite 77VT Brass Non-Adjustable Air Valve, 3/4 x 1/2", Male x Female

• All vents are factory assembled, tested and inspected in the USA
• Each vent is individually packed with external labeling for convenience and maintenance
• Our vents have all brass internals with nickel plated and hand polished exterior
• Every Vent-Rite vent is factory assembled, tested and inspected in the USA

Sid Harvey Item #:77VT: Replaces Part #:'s : 6G1031
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Vent-Rite Corporation 77VT

Vent-Rite Corporation 77VT

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

Sid Harvey Item #:9DM3SW1/2: Replaces Part #:'s : 40588,
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9DM3SW1/2

9DM3SW1/2

925006-00 Heat-Timer Corporation
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Heat-Timer Corporation 925006-00

Heat-Timer Corporation 925006-00

Heat-Timer Corporation Varivalve 925005-00 Chrome-Plated Brass Angle Radiator Quick Vent Valve, 1/8", Male

• Exclusive fingertip adjustment
• Large variable orifice
• Phosphor bronze bellows
• High temperature"o" ring seal
• Seat and poppet at inlet to valve

Sid Harvey Item #:925005-00: Replaces Part #:'s : 7G153,

Heat-Timer Corporation 925005-00

Heat-Timer Corporation 925005-00

Cash Acme VR-801 Vacuum relief valve is designed to protect hot water supply systems and pressure vessels against negative pressure. It is especially well suited for many domestic and commercial systems. It works by preventing internal Vacuum conditions that could result in burned out heaters and/or collapsed storage tanks. Installed on the cold water supply line, the Cash Acme VR-801 closes tightly under pressure and opens at a 1" mercury Vacuum. Atmosphere admitted to the system breaks the Vacuum, preventing collapse of the storage tank.,

Cash Acme VR801-34LF

Watts Regulators series 174A boiler pressure relief valves are used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet drain connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 174A resists corrosive water conditions, 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.

Watts Water B145

Watts Water B145

Watts Regulator series 374A boiler pressure relief valves are used in hot water boiler applications to protect against excessive pressure on all types of hot water heating boiler equipment. It consists of an iron body construction with forged bronze inlet connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 374A resists corrosive water conditions, 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 forged brass inlet
• Seat located above drain, water cant be trapped and sediment cant 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
• Non-metallic disc-to-metal seating
• Bronze inlet wetted parts

Sid Harvey Item #:B145-9A: Replaces Part #:'s : B145-9A,

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Watts Water B145-9A

Watts Water B145-9A