Nozzle body enabling Omax users to connect their non-tilting MJ4 on/off valve to a lower cost, more versatile cutting head. This nozzle body enables connecting to the IDE cutting head (the original integrated diamond cutting head) or the DP-3000 (the original cartridge-style cutting head which uses a ruby orifice-mixing-chamber-insert and provides high alignment). The DP-3000 allows having a variety of orifice sizes for varying kerfs, at very low cost. High alignment provides longer mixing tube life, better edges. The inserts take the wear, protecting the DP3000 body.