Chemical injector
The new 40 GPM series of waterpowered chemical injectors requires no electricity and includes three models to choose from with various dilution ranges. They are all available with an optional bypass and union upon request. With flow rates up to 40 GPM, this new series is easy to install and maintain. The most exciting feature is its user-friendly, metal-free piston that has 63% fewer parts compared to older styles.
from Dosatron International, Inc.