AQUATEC CDP6800 High Pressure Booster Pump with 110V Transformer - Perfect for RO Systems, Water Filtration & Home Appliances

It's quiet enough that I can't hear it at all with the cabinet door closed. I hooked it up after the carbon filters and before the RO filter as the instructions suggest. This should make the pump last longer as it is not pumping dirty water. You'll need a few more feet of 1/4 inch tubing to do this so plan on getting some ahead of time. You'll need the TSO for the pump to work with your water tank, you should also get the ESO and install it on the water line going into the pump to do a complete job and prevent water from creeping into the filter when the pump is off because of the existing pressure from your tap line. It brought my incoming tap pressure of 45-50 psi to the carbon filters up to 65-70 psi into the RO filter which is fine. This setup is working well and I recommend it for others.