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.

• Safety relief valves for pressure protection only of all types of hot water heating boiler equipment
• 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
• Water seal of high temperature resisting material isolates spring working parts from water during relief

Sid Harvey Item #:B145-2: Replaces Part #:'s : 24572
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B145-2

B145-2

Dole 90-1 Air/Steam Straight Valve, 1/2 x 3/4", MIP x FIP

Dole B153-10

Gorton Heating Corp Vertical Straight #1 Air Vent Valve, 3/4 x 1/2",,
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Gorton Heating B153-1

Gorton Heating B153-1

Dole B49-2 Flow Valve 1/2" FPT 3.5 GPM,
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B49-2

B49-2

Dole B49-3 Flow Valve 4.0 GPM 1/2 FPT
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B49-3

B49-3

Watts BBFP Forged Brass Dual Check Backflow Preventer with Intermediate Atmospheric Vent, 1/2", Union Thread

• Dual check valves with intermediate atmospheric vent 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
• Designed for continuous pressure, non-health hazard applications in smaller supply lines

Sid Harvey Item #:B146-70A: Replaces Part #:'s : 2K558,
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Watts Water B146-70A

Watts Water B146-70A

Watts Water B911P Back Flow Preventer 1/2" Pro-Press

Pressure regulating valve for automatic control of boiler feed water and other pressure reducing applications. Especially constructed for expansion tank mounting.

• Fast fill feature
• Built-in check valve
• Fill valve has 1/2" internal NPT threads and external union threads on both input and output sides
• 1/4" NPT port on side for optimal gauge
• Manual shut off valve on bottom
• Includes union nut, sweat and threaded tailpiece

Sid Harvey Item #:FM911: Replaces Part #:'s : R55-623,
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Resideo Braukmann FM911

Resideo Braukmann FM911

Honeywell G7L-1A-TUB-CB-120V Relay 120 VAC SPST N/O

Resideo Gold Top FV180/U Universal Air Vent, 1/8", MNPT, 150 psi, 240 deg F, Brass

• One fits all concept, to stock one vent for all your venting needs
• Resideo's revolutionary patented fulcrum design offers a venting rate of 3-4 times that of other products
• It works when others stop venting at higher pressures

Sid Harvey Item #:FV180: Replaces Part #:'s : L38-322,

Honeywell FV180

Honeywell FV180

Resideo FV147/U Air Vent, 1/8", MNPT, 150 psi, 240 deg F, Brass

• The maxivent features a low profile, fit anywhere solid brass body and cover and a high temperature polypropylene float
• Angle body pattern

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Honeywell FV147

Honeywell FV147

Honeywell Home HPZC103 Valve Controller 3-Zone

HPZC103

HPZC103