Rotary Evaporator Bump Traps are designed to eliminate hold-up common to the round style of rotary evaporator traps.

It has tapered side walls permit continuous washing with condensed solvent, while preventing vapor cooling points along the path of the condenser. The upper stem has four large holes, flush with the lower end, allowing solvent vapor to flow freely and making this portion of the trap easy to clean. The increased volume of the trap prevents bumping and keeps solvent out of the vapor tube. The top outer [ST] joint on all traps is 24/40.