Chapter SPS 382

Note: SPS Table 382.40-13 applies only to water services and private water mains.

Table 382.40-14

Table 382.40-15
Maximum Allowable Load for Schedule 80 CPVC ASTM F 441 Pipe (2 1/2 to 10 inches)

SPS 382.40 Note Note: CPVC 3 inches and larger only approved for cold water.

SPS 382.41 SPS 382.41 Cross connection control.

SPS 382.41(1) (1) Scope. The provisions of this section set forth the requirements for the protection of water within water supply systems when and where there is the possibility of contamination due to cross connections or backflow conditions.

SPS 382.41 Note Note: The Department of Natural Resources governs the operation and design of community water systems and under s. NR 810.15 (1) requires the supplier of water to develop and implement a comprehensive cross connection control program.

SPS 382.41(2) (2) Materials.

SPS 382.41(2)(a) (a) All methods, devices, and assemblies intended to protect water supply systems from cross connections shall be of a type recognized and approved in accordance with ch. SPS 384 and as described in sub. (4).

SPS 382.41(2)(b) (b) All methods including barometric loops and air gaps intended to protect water supplies relative to cross connection or backflow shall be constructed of materials suitable for water supply systems in accordance with ch. SPS 384.

SPS 382.41(3) (3) General requirements. Water supply systems and the connection of each plumbing fixture, piece of equipment, appliance or nonpotable water piping system shall be designed, installed and maintained in such a manner to prevent the contamination of water supplies by means of cross connections.

SPS 382.41(3)(a) (a) Types of cross connection control.

SPS 382.41(3)(a)1. 1. Water supply systems shall be protected against contamination due to cross connections or backflow conditions by one of the methods or devices specified in Table 382.41-1 depending upon the situation or Table 382.41-2 depending upon the specific application or use, and the limitations specified in sub. (4).

SPS 382.41(3)(a)2. 2. For the situations described in par. (b) 3., cross connection control shall be provided as part of the fixture fitting outlet or in the water supply piping for the fixture fitting outlet.

SPS 382.41(3)(b) (b) Classifications. For the purposes of this section:

SPS 382.41(3)(b)1. 1. The designation of a high hazard or low hazard situation shall be determined on the basis of how a toxic or nontoxic solution is intended or recommended by the manufacturer of the solution to interface with the potable water supply system.

SPS 382.41(3)(b)2. 2.

SPS 382.41(3)(b)2.a. a. A continuous pressure situation shall be considered to exist when a pressure greater than atmospheric within the water supply system exists for more than 12 continuous hours.

SPS 382.41(3)(b)2.b. b. A noncontinuous pressure situation shall be considered to exist if the conditions in subd. 2. a. do not occur.

SPS 382.41(3)(b)3. 3. A high hazard cross connection situation shall be considered to exist for a connection of the water supply system to:

SPS 382.41(3)(b)3.a. a. Any part of the drain system; and

SPS 382.41(3)(b)3.b. b. Any other piping system conveying water from nonpotable sources, including but not limited to lakes, rivers, streams or creeks.

SPS 382.41(3)(b)4. 4. Except as provided in subd. 5., a high hazard cross connection situation shall be considered to exist at:

SPS 382.41(3)(b)4.a. a. A water supply hose bibb, faucet, wall hydrant, sill cock or other outlet which terminates with hose threads allowing a hose to be attached;

SPS 382.41(3)(b)4.b. b. A water supply faucet, wall hydrant or other outlet which terminates with a serrated nipple allowing a hose to be attached;

SPS 382.41(3)(b)4.c. c. A water supply faucet, hydrant or outlet serving a sink used for building maintenance in a public building;

SPS 382.41(3)(b)4.d. d. A chemical pot-feeder or automatic chemical feeder is installed to serve a boiler, cooling tower or chilled water system; and

SPS 382.41(3)(b)4.e. e. In the water supply piping connecting to the outlet of a fire hydrant for any purpose other than fire fighting.

SPS 382.41(3)(b)5. 5. A cross connection may not be considered to exist at the hose threaded outlet installed for the sole purpose of any of the following:

SPS 382.41(3)(b)5.a. a. Draining a water supply system or any portion thereof.

SPS 382.41(3)(b)5.bm. bm. Connecting individual portable dialysis machines when enclosed in a lockable box.

SPS 382.41(3)(b)5.c. c. Connecting individual residential-type automatic clothes washers or dryers.

SPS 382.41(3)(b)6. 6.

SPS 382.41(3)(b)6.a. a. A high hazard situation shall be considered to exist for the connection of 2 water supply systems one supplied by a public water supply and the other system supplied by a private well.

SPS 382.41 Note Note: The interconnection of a public water supply system and another source of water is addressed in ss. NR 811.06 and 811.07 and must be approved by the Department of Natural Resources.

SPS 382.41(3)(b)6.b. b. Cross connection control devices used in conjunction with automatic fire sprinkler systems shall be listed by an acceptable testing agency for such an application under the standards governing the design and installation of automatic fire sprinkler systems.

SPS 382.41(3)(b)7. 7. A cross connection situation shall not be considered to exist when a multipurpose piping system serves a one- or 2- family dwelling provided the sprinkler system is constructed of materials and joints suitable for water distribution systems as specified in ss. SPS 384.30 (4) (e) and 384.40, respectively.

SPS 382.41(3)(c) (c) Containment.

SPS 382.41(3)(c)1. 1. For sewerage treatment facilities which are required to conform with ch. NR 110, in addition to the cross connection control required for each potable water usage or water outlet, a reduced pressure principle backflow preventer shall be installed:

SPS 382.41(3)(c)1.a. a. In the water service to each building or structure within the complex;

SPS 382.41(3)(c)1.b. b. In the private water main upstream of all water services serving the facility; or

SPS 382.41(3)(c)1.c. c. In the water distribution system upstream of all water outlets and in the process piping network upstream of all points of use, if both a water distribution system and a process network is contained within the same building or structure.

SPS 382.41(3)(c)2. 2. For marinas, wharves and docks where potable water outlets are provided to serve boats or ships, in addition to the cross connection control required for each potable water outlet or usage, a reduced pressure principle backflow preventer shall be installed in the water supply system to limit backflow into the water supply source.

SPS 382.41(3)(c)3. 3. The installation of a cross connection control device in the water supply system for a building or structure shall not alleviate the requirement to provide cross connection control for the connection of each plumbing fixture, piece of equipment, appliance or other piping system.

SPS 382.41(3)(d) (d) Prohibitions.

SPS 382.41(3)(d)1. 1. The use of a toxic solution as a heat transfer fluid in single-wall heat exchanger for potable water is prohibited.

SPS 382.41(3)(d)2. 2. A cross connection control method, device, or assembly may not be bypassed without a cross connection control method, device, or assembly of at least equal protection.

SPS 382.41(3)(e) (e) Existing automatic fire sprinkler systems. An alteration, modification or addition to an existing automatic fire sprinkler shall necessitate conformance with this section, if the:

SPS 382.41(3)(e)1. 1. Existing water supply line to the existing sprinkler system is increased in diameter; or

SPS 382.41(3)(e)2. 2. Existing device or method which had been previously recognized to address cross connection concerns is to be removed or replaced.

- See PDF for table

⋄ = The use a of a hose connection backflow preventer, dual check backflow preventer wall hydrant-freeze resistant or a hose connection vacuum breaker in a continuous pressure situation shall be limited to campgrounds and marinas.

1 = Closed loop boiler feed only, standard does not require NSF/ANSI 372 or NSF/ANSI/CAN-61 conformance.

SPS 382.41(4) (4) Limitations.

SPS 382.41(4)(a) (a) Cross connection control devices shall be limited in use in accordance with the respective standard, unless otherwise specifically permitted under this subsection.

SPS 382.41(4)(b) (b)

SPS 382.41(4)(b)1. 1. Except as provided in pars. (b) 2. and (o), an atmospheric-type vacuum breaker shall be installed such that the bottom of the device or the critical level mark on the device is at least 6 inches above all of the following:

SPS 382.41(4)(b)1.a. a. The flood level rim of the receptor serving the water supply port.

SPS 382.41(4)(b)1.b. b. The highest point downstream from the device where backpressure would be created.

SPS 382.41(4)(b)1.c. c. The highest point of an injection or aspiration port.

SPS 382.41(4)(b)2. 2. A deck-mounted atmospheric type vacuum breaker shall be installed such that the bottom of the device or the critical level mark on the device is at least 1 inch above all of the following:

SPS 382.41(4)(b)2.a. a. The flood level rim of the receptor serving the water supply port.

SPS 382.41(4)(b)2.b. b. The highest point downstream from the device where backpressure would be created.

SPS 382.41(4)(b)2.c. c. The highest point of an injection or aspiration port.

SPS 382.41(4)(c) (c)

SPS 382.41(4)(c)1. 1.

SPS 382.41(4)(c)1.a. a. The use a of a hose connection backflow preventer, dual check backflow preventer wall hydrant-freeze resistant or a hose connection vacuum breaker in a continuous pressure situation shall be limited to campgrounds and marinas.

SPS 382.41(4)(c)1.b. b. The use of a hose connection backflow preventer and a hose connection vacuum breaker shall be limited to the discharge side of a control valve such as a faucet or hose bibb.

SPS 382.41(4)(c)2. 2. A hose connection backflow preventer and a hose connection vacuum breaker may not be employed in backpressure situations of more than 10 feet of water column.

SPS 382.41(4)(d) (d) A backflow preventer with intermediate atmospheric vent:

SPS 382.41(4)(d)1. 1. May not be employed in backpressure situations of more than 150 psig; and

SPS 382.41(4)(d)2. 2. May not serve boilers having a maximum steam pressure setting greater than 15 psig or a maximum water pressure setting greater than 30 psig.

SPS 382.41(4)(e) (e)

SPS 382.41(4)(e)1. 1. A reduced pressure principle backflow preventer and a reduced pressure detector backflow preventer may not be subjected to a backpressure greater than twice the rated working pressure of the device.

SPS 382.41(4)(e)2. 2. A reduced pressure principle backflow preventer and a reduced pressure detector backflow preventer which serve a water-based fire protection system may have a test outlet located between the number 2 check valve and the number 2 listed indicating control valve.

SPS 382.41(4)(e)3. 3. A reduced pressure principle backflow preventer and a reduced pressure detector backflow preventer which are 2” or smaller in size and which serve a water-based fire protection system are not required to have a test cock on the number one listed indicating control valve.

SPS 382.41(4)(f) (f) A hand-held shower may not be employed in backpressure situations of more than 5 feet of water column.

SPS 382.41(4)(g) (g)

SPS 382.41(4)(g)1. 1. A double check backflow prevention assembly and a double check detector assembly backflow preventer may not be subjected to a backpressure greater than twice the rated working pressure of the device.

SPS 382.41(4)(g)3. 3. A double check backflow prevention assembly and a double check detector assembly backflow preventer which are 2” or smaller in size and which serve a water-based fire protection system are not required to have a test cock on the number one listed indicating control valve.

SPS 382.41(4)(h) (h) A water supply fed trap seal primer valve shall be installed such that the bottom of the device or the critical level as marked on the device is at least 12” above: