I installed the IntellipH in combination with the Intellichlor IC40 Salt Cell and Intellichlor Power Center for the Salt Cell. I was replacing a Jandy Aquapure 1400 salt cell. My system shares the pump between the spa and pool and uses Jandy 2444 electronic valves to switch between them that are controlled by a Jandy Aqualink RS control panel. The Aqualink panel also used to turn off the salt cell when in spa mode to not over chlorinate the spa while in spa mode (i.e. while your in it). With the integration of the Pentair components one loses this direct communication to turn off the salt cell. To correct this, I installed the Pentair salt cell after the Jandy valve on the pool return side of the plumbing (Jandy salt cell was installed before the valve). The Pentair IC40 salt cell has an integrated flow switch, therefore in this configuration it will only turn on when in pool mode. In spa mode, there is no flow thru the cell. I was also concerned that the Intellisense pH would dose when in spa mode. Fortunately the Intellisense pH connects to the Intellichlor IC40 salt cell. It actually becomes the controller of the IC40 where you can see the cell status such as salt ppm level, water temp, and control cell output percentage. Any items that would cause the IC40 salt cell not to turn on (such as no flow, low water temp, etc) will also prevent the Intellisense pH from dosing acid. So in this configuration, the system will not dose when in spa mode because their is no flow present to the IC40.The Intellisense display panel is straight forward and instructions are good on how to calculate the percentage acid dispense setting based on pump run time and amount of acid you want to dispense. I calculated my total weekly acid that I manually add and used this to come up with a percentage setting based on pump run time. I have not run long enough to see if I need to adjust but the manual indicated that it could take several weeks to adjust exactly.The manual falls down on the actual instruction related to the hose connections for the Intellisense pH between its tank, pump, and your piping. They are as follows: 1. Suction line on tank connects to inlet of pump indicated by an upward arrow on pump housing. 2. Outlet of pump (indicated by downward arrow) connects to injection fitting that you installed on your pool piping (using supplied plastic clamshell and hose clamps, make sure to use Teflon tape on injection fitting to prevent leaks) 3. Vent on tank connects to short hose supplied on kit and just vents to the ambient and provides make up air. The tank is well sealed so without it the tank would be under a vacuum after the pump runs enough to remove all the air.The Intellisense pH tank needs to be secured to something weighted and that can accept screws. The manual recommends your pool equipment pad. Mine were all occupied so I used a large patio paver (roughly 16" x 24") from Lowe's that I drilled and inserted concrete plastic anchors.I installed the control panel and power center to my block wall. For this installation it was very helpful to have a hammer drill and 1/4" concrete bit as well as for the install of the tank to the patio paver. Other tools and materials used were 1. Silicon grease for gaskets, 2. Teflon tape for fittings, 3. 1/2" drill bit for drilling acid injection hole into existing pool piping, 4. Screwdriver, and 5. Tywraps to neaten up wiring.I hope that with proper maintenance I will get many years out of both the IC40 salt cell and Intellisense pH.