We have been pricing out a new tower for a Lapierre 600 gph RO. Looks like most of the big equipment dealers want around $5000 for the add on. That includes parts and labor. MES quoted us around $1100 for a fiberglass vessel and a membrane. Seems like the most expensive part is the recirculation pump/motor which is also apparently proprietary. Has anyone been able to add a tower buying the parts and assembling themselves? What should we expect to pay for a recirc pump and motor? Seems a bit crazy to pay $6500 for a used RO and its 5k to add a tower.