Another good reason to have a booster pump is to increase pressure to the membrane. It can be setup so that it keeps 80-90 PSI at the membrane. That is, after the sediment/carbon block prefilters, where some pressure loss will occur. The booster will also maintain your water pressure and consequent efficiency even if you're flushing a toilet, taking a shower, watering the lawn, etc. when some pressure loss will happen even if your static water pressure is good ...

A good idea, IMHO ...