The 2-groove (2Grv) marking is a technical identifier used by HVAC contractors to confirm flow characteristics and compatibility without needing to gauge the orifice manually

How do I determine if my Raypak unit needs a 007189F gas valve

Heavy-Duty Construction: Features an all-steel cover and internal bellows designed for high-vibration commercial environments

Its compact footprint makes it an ideal fit for tight cabinet spaces in commercial refrigeration reach-ins

Designed as the dedicated ZS-101 mounting plate for the Belimo ZS-100 weather shield

Weil McLain 511-330-088 Control Board Els PW 29614 The 2-groove (2Grv) marking isThe Weil McLain 511 330 088 Control Board is a genuine OEM integrated replacement designed specifically for high efficiency hydronic systems. As a direct drop in for the Weil McLain 1013 200, this module serves as the central logic unit for Gold GV series water boilers and AHE series direct vent units. For contractors managing boiler troubleshooting, this integrated boiler control manages critical sequences including ignition control, blower speed