HydraMaster has added the Last-Step Chemical System to its CDSTM 4.6 and 4.8 Overdrive. Last-Step Chemical injection means no chemical passes through the water pump or heat exchangers, the company said.

The patented Chemical Pulse Pump is designed to withstand high temperatures and high pressures. It is equipped with a heavy-duty diaphragm and is easy to disassemble and repair, according to HydraMaster.