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Humidifier Valve 4040 Solenoid Valve Brass Air Valve. All Aprilaire humidifiers (except models 110, 112, 350, 360) use the # 4040 24 Volts AC Solenoid Valve. Most newer Honeywell, Skuttle, Herrmidifier, Autoflo, and Lobb humidifiers also use a 24 volt solenoids. Most humidifier solenoid valves are operated on 24 Volt AC power, which is the predominant low voltage wiring standard for conventional HVAC controls. 24 Volt wiring is thin, 18 gauge wire - much smaller than 110 or 240 Volt line voltage wiring.
• old valve
• not shutting off
• allowing water to run continuously
Model No.: A2012
Pressure: 125 PSI
Volt: 24 VAC
Frequency: 50/60 HzOrifice：3/64
Material: brass and copper wire
Q: Will this work with a “general“ brand on the furnace humidifier? The numbers on my current label are as follows: 24/60, 8.5 watts, and 3/32 orifice.
A: The specs do align with the 4040 valves. You’ll have to verify that the mechanical appearance would fit your specific installed unit. One common failure is that the valve orifice can clog if your water source has high amounts of calcium deposits or sand.
Q: My solenoid is RP corporation and has b2015-s51 but the orifice is 3/32. this one states the orifice as 3/64 will this size difference be a problem?
A: Quite a bit smaller and no expert but would reduce flow.
Q: Does this valve include an in-line strainer? (brass) so I do not need to purchase a plastic one?
A: Yes it does.
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