The main valve ball is also called a valve carrier, retainer or plate depending on which hydrant model.  This component holds the main valve disc in place and is attached to the lower stem.  This particular component hardly ever requires replacement. 

Our qualified technicians know what parts to dismantle quickly and easily to replace the parts that do wear out such as the main valve disc.  Please contact us today, if your hydrant has not been restored in the last 3-5 years.