| Type: | Natural Gas (NG) |
|---|---|
| Voltage: | 24V |
| Connection Size: | 1/2" |
| Connection Type: | Threaded |
| Size: | 1/2" |
| Used With: | HE Boilers HE II Boilers VHE Boilers |

Hi Darla, thanks for writing in. This is the correct gas valve for the Weil Mclain HE-4, series 2 (natural gas), and the flame sensor would be SKU: 511-330-192 https://www.supplyhouse.com/Weil-Mclain-511-330-192-Main-Flame-Sensor-for-White-Rodgers-Control-50E47-871-for-HE-VHE-Boilers
Yes, SKU:510-811-656 is the direct replacement of SKU:36C74-227.
If the boiler has hot surface ignition, the valve for natural gas is 510-811-655 and he propane valve is 510-811-656.