What is needed to prevent cross connections between pool and water supply?

To prevent cross connections between the pool and the water supply, an anti-siphon device is essential. This device works by ensuring that water cannot flow backward from the pool into the potable water supply. It achieves this by maintaining a separation between the two systems, thereby eliminating any risk of contamination that could occur if changes in pressure in the water supply caused backflow.

In swimming pools, maintaining water quality is critical, and preventing any potential contamination of the municipal water supply is a vital aspect of pool operation. An anti-siphon device protects against situations where water could be siphoned back into the clean supply, ensuring compliance with health and safety regulations.

Other options like pressure regulators, chlorine injectors, and UV systems serve different functions. Pressure regulators manage the water pressure within the pool system, promoting stability but not preventing cross connections. Chlorine injectors are used for sanitation, while UV systems help in treating water, but none of these directly prevent cross-connections in the way that anti-siphon devices do.