Not sure what size backplate is on your C-Series pump? It’s right in the description! The third number is the backplate diameter in inches.

114 pump – 4” backplate
216 pump – 6” backplate
328 pump – 8” backplate
4410 pump – 10” backplate

For more information on our Sanitary Pumps, visit our website or call our Technical Services Department at 800-826-8302.