A method for forming a disposable dental valve device is disclosed which comprises the steps of injecting a resin into a mold with the melt temperature of the resin being about 201° C. and the mold temperature being about 35° C., filling the resin in the mold for a fill time of about 0.70 seconds, providing a peak first stage fill pressure of about 61.9 Mpa, providing a pack pressure of about 49.5 Mpa, and providing a pack time of about 5 seconds.