§ 31.153. Definitions.

(a)

Backflow shall mean the flow of water or other liquids, mixtures or substances into the distribution pipes of a potable supply of water from any source or sources other than its intended source.

(b)

Backflow preventer shall mean a device or means to prevent backflow.

(1)

Double check valve assembly shall mean an assembly composed of two single, independently acting, approved check valves, including tightly closing shutoff valves located at the end of the assembly and suitable connections for testing the water-tightness of each check valve.

(2)

Reduced pressure principle backflow prevention device shall mean a device containing within its structure a minimum of two independently acting, approved check valves, together with an automatically operating pressure differential relief valve located between the two check valves. The first check valve reduces the supply pressure a predetermined amount so that during normal flow and at cessation of normal flow the pressure between the check valves shall be less than the supply pressure. In case of leakage to either check valve, the differential relief valve, by discharging to atmosphere, shall operate to maintain the pressure between the checks less than the supply. The unit shall include tightly closing shutoff valves located at each end of the device, and each device shall be fitted with properly located test cocks.

(c)

Back pressure shall mean backflow caused by a pump, elevated tank, boiler, or other means which would create pressure within the system greater than the supply pressure.

(d)

Back siphonage shall mean a form of backflow due to a negative or subatmospheric pressure within a water system.

(e)

Consumer (customer) shall mean any person, firm or corporation, using or receiving water from the county.

(f)

Cross connection shall mean any physical connection or arrangement between two otherwise separate piping systems, one of which contains potable water and the other water, or other fluid of unknown or questionable quality.

(g)

Interconnection (direct cross connection) shall mean any system of piping or other arrangement whereby the public water supply is connected directly with a sewer, drain, conduit, pool, storage reservoir, or other device which does or may contain sewage or other waste of liquid which would be capable of importing contamination.

(h)

Point of delivery (service connection) shall mean the terminal end of service from the public potable water system at the meter installation which shall include the backflow prevention device when aid device is installed adjacent to the water meter. In other words, it is that point where the county loses jurisdiction and sanitary control over the water at its delivery to the consumer.

(i)

Water, nonpotable, shall mean water which is not safe for human consumption, or which is of questionable potability.

(j)

Water, potable, shall mean water from a source which has been approved for human consumption, meets the quality criteria in F.S. § 17.22 and is compatible with water produced by the county.

(Ord. No. 2003-07, § 3, 4-7-2003)