Soaps are a group of cleaning chemicals derived from plant oils or animal fats - they help to dissolve dirt and other particles so that they can be carried away by water. There are many different types of soap…like liquid soap, rosin soap, and castile soap…and they each come with their own properties. The 4127C Series™ is stainless steel and has cartridge lip seal options. They have capacities up to 320 gallons per minute. 4124A Series™ pumps are cast iron and have cartridge lip seal options. Bushing material can be adjusted to meet process needs.