Why does this orifice have two grooves

As a genuine Marley heater repair part

preventing issues like soot accumulation or delayed ignition

For veteran contractors

Built for the rigors of field service

JB T3-8D 1/2 x 1/2 x 1/2 Brass Tee Why does this orifice haveThe JB Industries T3 8D is a professional grade 1 2 SAE x 1 2 MPT x 1 2 SAE brass tee engineered for high pressure HVACR manifold and piping applications. This flare x male pipe x flare tee is forged from premium C360 brass, ensuring a high tensile strength that withstands the rigors of field service. Designed to meet SAE J513 standards, the T3 8D provides a reliable, leak proof 45? flare connection, making it ideal for splitting or joining lines in