The first week we had our new Key Largo I add a whole house style pressure regulator and water filter. I mounted the regulator in the basement on the ODS just inside the hatch, with the filter just below it. I was able to come in and out of the mechanical area with the heating duct, this area made for a nice clean out of the way look. Also added a gauge so its easy to make adjustments. With this set up you get great flow compared to the small in-line regulators.