or loose connections at the gas valve

For 3/4" assemblies

including older RSS series components

Precise Fit: Features a high-tolerance 6

What causes a 300 degree F rollout switch to trip

Weil McLain 511-724-254 Thermocouple or loose connections at theWhen you're dealing with a standing pilot that won't hold, the Weil McLain 511 724 254 30 inch Thermocouple is the specified OEM solution for restoring millivolt signal reliability. This is a screw in thermocouple designed specifically for natural gas boilers, featuring the heavy duty construction required for high cycle commercial and residential environments. At a 30 inch lead length, it provides ample slack for proper routing away from high heat