1/2" X 1/2" Combo Gas Valve (100,000) Zoom

1/2" X 1/2" Combo Gas Valve (100,000)


Brand: Robertshaw

700-408 has been discontinued.
Please contact customer service at
(888) 757-4774 for help finding an alternative.



Inlet Size: 1/2"
Outlet Size: 1/2"
Capacity: 100000 BTU
Capacity (BTU): 100000
Pressure Reg Setting: 3.5" W.C. NAT. GAS
Fuel Type: Natural Gas
Gas Type: Natural Gas

Description for Robertshaw 700-408

For reliability, performance, flexibility and ease of installation and service in one compact control, Robertshaw's 24 volt combination gas valves are the answer. These valves feature a manual valve (gas cock), an automatic pilot safety valve, inlet/outlet screens, pilot outlet, pilot gas filter and pilot adjustment key. Regulated and nonregulated models are available (see ordering chart). Models that have a safety magnet have a "notched or slotted" magnet for applications requiring the use of an ECO (Energy Cut-Off) switch. The automatic pilot safety valve is separate from the gas cock and provides gas shutoff in case of pilot outage. VALVES CAN BE MOUNTED IN ANY POSITION EXCEPT UPSIDE DOWN. Consult ordering charts for individual control specifications.

The 700 Series 24 Volt Uni-Kits have a pressure regulator installed that is set for natural gas (3.5" W.C.) To convert to L.P. gas, a regulator cover plate is included. Simply remove pressure regulator and install the regulator cover plate.


  • Electrical rating: 12 VDC 0.18 amps
    24 VAC 0.2 amps 50/60 Hz
  • Pressure regulator: factory set at 3.5" W.C.
  • Pilot outlet: 1/4" tubing
  • Gas cock dial marking: off-pilot-on
  • Terminal type: combination screw/spade
  • Ambient temperature : 40° to 175°F
  • Maximum inlet pressure: 14" W.C. (1/2 PSI)

1/2" X 1/2" Combo Gas Valve (100,000)

Q&A: Ask the Questions, share answers

Do you have questions about this product?

Get answers from real customers and in-house experts with AnswerBox.

1 Question | 1 Answer
Displaying question 1
  • 1/2" X 1/2" Combo Gas Valve (100,000)


    11/22/15: Hello, I have a CARRIER Natural Gas Furnace, Model 58GC100-1A, Ser.#: K804927 - Built in 1968, placed in service in 1974. Input is 100,000 BTU/Hr. - 120 volt/<12 volt DC. The Gas Valve has frozen and I need to replace it. Owner's Manual states they were equipped with an ESSEX (Alfa Tafoo) TF 555 (used for the 58GC furnaces. A Robertshaw Unitrol 7000 was used for the 58GA models. My question is: Will this Robertshaw 1/2" x 1/2" Combo Gas Valve replace the Essex TF 555 valve? If not, do you carry the exact TF555 replacement valve? Thank You.
    Asked on 11/22/2015 by Grandpa B from Simi Valley, CA

    1 answer

Displaying question 1

Do you have a question about this product?