Swimming pool skimmer installed. Plumbing, in its simplest form, is what keeps the pool operational. It also is how any water features are running as well as the water level in the pool. All of the plumbing is pressurized when completed to ensure there are no leaks. The plumbing system stays pressurized though the shotcrete phase. Intricate spa plumbing. All of our pools are equipped with an automatic water leveler and a minimum of four looped pool returns. The pool filter, pool pump and salt cell (if specified) is installed during this phase. Usually a basic pool can be plumbed in one day.