The treatment system of a pool is typically recommended to be installed in which of the following flow arrangements?

The recommended flow arrangement for a pool treatment system is the one that includes a comprehensive set of components designed to ensure effective filtration and disinfection of the pool water. By including a skimmer or gutter line, main drain line, adjustment valves, hair strainer, filter aid, pump, filters, disinfectant feeder, pH feeder, and adjustable inlets, this arrangement addresses several critical aspects of pool maintenance.

First, the skimmer or gutter line captures debris and floating contaminants, preventing them from sinking to the bottom, while the main drain line helps to remove settled debris from the pool floor. The adjustment valves allow for precise control over water flow, optimizing the filtration process.

Incorporating a hair strainer protects the pump from damage caused by hair and other large particles, while filter aids enhance the filtration process by improving particle removal efficiency. The presence of both a disinfectant feeder and a pH feeder ensures that the water remains safe for swimmers by maintaining proper chemical balances, while adjustable inlets help to circulate water effectively throughout the pool.

This comprehensive flow arrangement effectively creates a complete water treatment and circulation system, which is essential in maintaining clean and safe pool water, making it the most appropriate choice among the options presented.