KSB Aktiengesellschaft Frankenthal / Germany was the first manufacturer to offer stock options for pump products to a broad range of pump products users by signing a "Shared Stock Contract" by a pump supplier. To rent a pump, the user only has to pay for the "liquid transfer" fee, but unlike normal rental transactions, manufacturers not only pay for the pump, but also provide the following services: Optimize pump user installation techniques to save more operation cost. For many users, this means that contract costs are included in the savings from running costs. With this system, industrial companies enjoy all the benefits of modern, energy-efficient equipment without making expensive investments. The costs of running the pump are included in the fixed annual fee, which gives the user an ideal way to control their budgetary expenditures.