Weil McLain 511-246-325 Gas Valve

Q: What size is the Weil McLain 511-246-325?

The LGB-6 to LGB-20 parts list identifies it as the Kinco-Balon 500 in the 1-inch size. The 1-1/4-inch valve is the 511-246-330.

Q: What does the 0.5 PSIG MAX marking on the handle mean?

It is the maximum working pressure marked on the valve, so it belongs on low-pressure gas piping and not on a high-pressure line.

Q: Can I leak-test the valve after installing it?

Yes. Open the valve slowly, then use gas leak detector solution on every threaded joint, the stem and the side plug. Any bubbles mean the joint or plug needs to be re-made before you put the boiler back in service.

Weil McLain

$186.00

The Weil McLain 511-246-325 Manual Gas Valve is the 1-inch Kinco-Balon 500 hand valve listed in the gas valve group of the Weil-McLain LGB-6 to LGB-20 boiler parts list. It is a lever-operated manual gas valve with a flat lever handle on a round stem, used to isolate the gas supply so a tech can service the boiler safely. The handle is stamped 0.5 PSIG MAX, the cast body is marked 500, and ON and OFF positions are cast into the body cap, which tells you this valve is built for low-pressure gas piping and not for high-pressure gas lines.

The Kinco-Balon 500 is the 1-inch size in a small family of Kinco-Balon valves that Weil-McLain specifies on its LGB gas trains. The next size up, the 1-1/4-inch Kinco-Balon 600, is Weil McLain 511-246-330, and the Kinco-Balon P2R pilot shut-off valve is 511-246-340, so make sure the number on your parts list is the 511-246-325 before you order. The body has threaded ends with hex wrench flats on each side and a side boss fitted with a hex-socket plug, and the body also carries a c-CSA-us certification mark. The lever handle carries a diamond-shaped logo along with the 0.5 PSIG MAX stamp.

A manual gas valve is a simple part, but it is a safety device, so replace it for the right reasons. Common reasons are a stiff or seized handle, a stem leak that shows up with a soap-bubble test, a cracked or distorted lever, or a valve that will not seat fully and lets gas by when closed. When you install the 511-246-325, use gas-rated pipe dope or PTFE tape approved for fuel gas, support the piping so the valve is not stressed, leak-test every joint with bubble solution after you open the valve, and check the burner and pilot operation before you leave. Always shut off gas upstream, purge according to local code, and have a licensed technician do the work.

Key Benefits

Factory Weil-McLain valve: The OEM 511-246-325, the 1-inch Kinco-Balon 500 specified in the LGB-6 to LGB-20 parts list, not a general hardware-store gas cock.
Clear size identification: Separates the 1-inch 511-246-325 from the 1-1/4-inch 511-246-330 and the 511-246-340 pilot valve so you can order the right size.
Tapped side boss: A side boss with a hex-socket plug is built into the body, and the body carries a c-CSA-us certification mark.
Lever isolation: A lever handle with ON and OFF positions cast into the body gives a clear open and closed position, so the gas supply can be shut off quickly at the boiler.

Common Questions

What size is the Weil McLain 511-246-325?
The LGB-6 to LGB-20 parts list identifies it as the Kinco-Balon 500 in the 1-inch size. The 1-1/4-inch valve is the 511-246-330.

What does the 0.5 PSIG MAX marking on the handle mean?
It is the maximum working pressure marked on the valve, so it belongs on low-pressure gas piping and not on a high-pressure line.

Can I leak-test the valve after installing it?
Yes. Open the valve slowly, then use gas leak detector solution on every threaded joint, the stem and the side plug. Any bubbles mean the joint or plug needs to be re-made before you put the boiler back in service.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.