What is the primary function of a booster pump in water systems?

The primary function of a booster pump in water systems is to increase feed water pressure. In various water treatment systems, especially in reverse osmosis setups, maintaining an adequate pressure level is crucial. The booster pump facilitates this by raising the pressure of the incoming feed water, which is essential for effective filtration and to overcome osmotic pressure in the membranes. This enhanced pressure helps in improving the flow rate and efficiency of the water production process, ensuring that the system operates optimally.

The other options do not relate to the primary role of a booster pump. Holding salt pellets pertains to the function of a water softener, while absorbing low molecular weight particles relates to the filtration process rather than pressure management. Measuring bacteria levels in water is typically done using specialized sensors or testing methods and is unrelated to the mechanics of boosting water pressure.