Flange Adapters

Gruvlok Grooved Flange Adapters for Flanged-to-Grooved Connections

A grooved flange adapter lets you connect a flanged valve, pump, or piece of equipment directly to a grooved piping system without welding a separate flange onto the pipe end. At 24hr Supply, our Gruvlok Fig. 7788 flange adapters bolt straight to Class 125 or Class 150 flanged components, simplifying transitions in fire protection, HVAC, and industrial piping.

Each adapter is built from ductile iron with a raised, serrated face for a secure gasket seal, and stocked in sizes from 2 to 12 inches in both painted and hot-dip galvanized finishes. Gruvlok fittings are fully interchangeable with Victaulic-style grooved systems, so you can mix and match without re-engineering the joint.

Match the adapter's flange class and pipe size to the equipment you're connecting, and confirm the groove dimensions meet your system's spec before ordering. Browse our full range of grooved couplings to complete the transition and keep the whole run leak-tight.