Yes I have pumps attached to each bulkhead. Makes it easier to put a 5 gallon bucket underneath. There is also a pump attached to the water transfer bulkhead. The RODI tubing goes from a small pump in the RODI barrel to a float valve in the salt mixing barrel. Soon I will have tubing connected to dosing pumps that will take water from the respective barrels to the inside ATO and AWC reservoirs inside.