§ 11-11-41. Piping system.

(a)

The piping system for swimming pools shall be composed of NSF listed materials or their equivalent designed for the following operations:

(1)

filling the swimming pool;

(2)

re-circulating the pool water through the treatment equipment;

(3)

backwashing or washing each filter to waste;

(4)

operating a suction cleaner (if provided);

(5)

emptying the pool; and

(6)

draining the system.

In addition, the piping system of any swimming pool containing a hydro-jet system or water conditioning system shall be composed of NSF listed materials, or equivalent, which are capable of supporting such systems.

(b)

There shall be no direct connections between the swimming pool recirculation system and the sewer or potable water supply. Fill spouts, when installed, shall be located under diving boards, under guard chairs, adjacent to pool ladder handrails, or otherwise protected to preclude a tripping hazard and shall be properly supported if not inherently self-supporting. Fill spouts shall not project into the space above the pool water surface by more than two inches beyond the edge of the pool. Other means of filling the pool shall comply with the VUSBC and be approved by the director. Cross-connections shall be prevented by providing an air gap between the highest possible flood level of the pool and the pool fill spout. The air gap shall not be less than two fill spout pipe diameters or less than six inches. An approved backflow prevention device may substitute for the air gap.

(c)

The system shall have a means of discharging filter backwash or other pool water to waste as follows:

(1)

Waste from backwashing or draining of a pool shall be discharged in a manner approved by the director. When only a sanitary sewer is available to a swimming pool, the rate of discharge is subject to the approval of the appropriate authority for sanitary sewers and treatment facilities.

(2)

An air gap to prevent a cross-connection between waste discharge piping and recirculation piping shall be provided.

(3)

Discharge receptor and piping of sufficient size to accept backwash water and prevent backflooding.

(4)

A sight glass in the backwash discharge line in a readily observable location.

(5)

In the event the backwash waste pipe will not accommodate the backwash flow, the design and installation of a holding tank shall be required. The holding tank shall be sized to contain 110 percent of the volume of water required to adequately clean the filter(s) at the backwash flow rate and length of time specified by the filter manufacturer.

(d)

The piping system shall be securely anchored, supported or braced, unless inherently self-supporting. Visible piping shall be marked with permanent tags, labels or markings to clearly identify the direction of flow and shall be color coded as follows:

(1)

Freshwater blue (to check valve).

(2)

Backwash black.

(3)

Influent yellow.

(4)

Effluent white.

(5)

Suction cleaner orange (to control valve).

(6)

Recirculation green (auxiliary recirculation not part of the filtration system; such as, but not limited to, water features, jets, fountains, water falls, aeration systems or similar features).

(7)

Heater piping red (to nearest isolation valves).

(e)

All piping shall be designed to minimize friction losses and to carry the required quantity of water at a velocity not to exceed eight feet per second for copper discharge piping, and 10 feet per second for discharge piping other than copper. Suction velocity for all piping shall not exceed six feet per second. Pipe suction velocity may also be limited by the maximum flow rate specified by the manufacturer of the suction outlet covers installed in the swimming pool.

(f)

All piping and appurtenances included in the recirculation and filtration system shall be inspected and approved by the director prior to covering. All plastic pipe connections and fittings shall be joined using the type primer and cement recommended by the pipe manufacturer. The primer and cement shall be of different colors so that they can be easily identified by visual inspection. All piping shall be tested at the time of inspection to at least 25 psi of pressure. All subsurface pool piping shall be imbedded in and covered with sand or an approved equivalent.

(g)

All valves shall be clearly identified with permanent markings or tags which are referenced by a pool water recirculation system operation manual and/or placard. (Ord. No. 4649, 3/13/10, Sec. 1)