subject: Hydraulic Ram Pumps and Their Use [print this page] When the water resource is abundant, the lifted water demand becomes a key parameter in selecting the suitable type and number of the hydraulic ram installed. The hydraulic ram pump (in different types or same types) could be installed in parallel. The greater the number of sets of hydraulic ram pumps installed, the greater the quantity of water that could be lifted. In this case, the water demand changed due to the rising living standard and the increasing population.