Current through Register Vol. 48, No. 39, March 25, 2024
Subpart 1.
Section 1702.1.
UPC section 1702.1 is amended to read as follows:
1702.1
General. The
installation, construction, alteration, and repair of rainwater catchment
systems intended to supply uses such as water closets, urinals, trap primers
for floor drains and floor sinks, industrial processes, water features, vehicle
washing facilities, cooling tower makeup, and similar uses shall be approved by
the commissioner.
Subp.
2.
Section 1702.2.
UPC section 1702.2 is amended to read as follows:
1702.2
Plumbing Plan
Submission. No permit for a rainwater catchment system shall be issued
until complete plumbing plans have been submitted and approved by the
commissioner in accordance with Minnesota Rules, part
1300.0215, subpart
6.
Subp. 3.
Section 1702.4.
UPC section 1702.4 is amended to read as follows:
1702.4
Connections to Potable or
Reclaimed (Recycled) Water Systems. Rainwater catchment systems shall
have no direct connection to a potable water supply or alternate water source
system. Potable or reclaimed (recycled) water is permitted to be used as makeup
water for a rainwater catchment system provided the potable or reclaimed
(recycled) water supply connection is protected by an air gap or
reduced-pressure principle backflow preventer in accordance with this code. An
automatic means to supply the rainwater catchment system with makeup water
shall be installed when there is insufficient rainwater to meet the required
demand or due to system failure.
Subp. 4.
Section 1702.5.
UPC section 1702.5 is amended to read as follows:
1702.5
Initial Cross-Connection
Test. Where a portion of a rainwater catchment system is installed
within a building, a cross-connection test is required in accordance with
Section 1702.11.2, as amended. Before the building is occupied or the system is
activated, the plumbing contractor shall perform the initial cross-connection
test in the presence of the Authority Having Jurisdiction. The test shall be
ruled successful before final approval is granted.
Subp. 5.
Section 1702.7.
UPC section 1702.7 is amended to read as follows:
1702.7
Rainwater Catchment System
Materials. Rainwater catchment system materials shall comply with
Sections 1702.7.1 through 1702.7.4.
1702.7.1
Water Supply and Distribution Materials. Rainwater catchment
water supply and distribution materials shall comply with Chapter 6, as amended
in this code, and the requirements of this code for potable water supply and
distribution systems, unless otherwise provided for in this section.
1702.7.2
Rainwater Catchment System
Drainage Materials. Materials used in rainwater catchment drainage
systems, including gutters, downspouts, conductors, and leaders shall be in
accordance with Chapter 11, as amended in this code, and the requirements of
this code for storm drainage.
1702.7.3
Storage Tanks.
Rainwater storage tanks shall comply with Section 1702.9.5, as amended in this
code.
1702.7.4
Collection
Surfaces. The collection surface shall be constructed of a hard,
impervious material.
Subp.
6.
Section 1702.9.
UPC section 1702.9.3 is amended to read as follows:
1702.9.3
Collection Surfaces.
Rainwater catchment systems shall collect rainwater only from roof surfaces.
Rainwater catchment systems shall not collect rainwater from:
(1) vehicular parking surfaces;
(2) surface water runoff;
(3) bodies of standing water; or
(4) similar nonroof surfaces.
1702.9.3.1
Prohibited
Discharges. Overflows and bleed-off pipes from roof-mounted equipment
and appliances, condensate, and other waste disposal shall not discharge onto
roof surfaces that collect rainwater for rainwater catchment systems.
Subp. 7.
Section
1702.9.
UPC section 1702.9.4 is amended to read as follows:
1702.9.4
Minimum Water Quality.
The minimum water quality for rainwater catchment systems shall meet the
applicable water quality recommendations in Table 1702.9.4.
Subp. 8.
Section
1702.9.4.
UPC section 1702.9.4 is amended by adding the following
table:
TABLE 1702.9.4
Measure
|
Limit
|
Turbidity (NTU) |
<1 |
E. coli (MPN/100 mL) |
2.2 |
Odor |
Non-offensive |
Temperature (degrees Celsius) |
MR |
Color |
MR |
pH |
MR |
MR = measured and recorded only
Treatment:
5 micron or smaller absolute filter
Minimum .5 -log inactivation of viruses
Subp. 9.
Section 1702.9.5.
UPC subsection 1702.9.5.1 is amended to read as follows:
1702.9.5.1
Construction. Rainwater storage shall be constructed of solid, durable
materials not subject to excessive corrosion or decay, watertight, and suitable
for rainwater storage.
Subp.
10.
Section 1702.9.5.
UPC section 1702.9.5.6(A) is amended to read as
follows:
1702.9.5.6 (A) Animals
and Insects. Rainwater tank openings shall be protected to prevent the
entrance of insects, birds, or rodents into the tank and piping system. Screen
installed on vent pipes, inlets, and overflow pipes shall be
corrosion-resistant and have an aperture of not greater than 1/16 inch (1.6 mm)
and shall be close-fitting.
Subp.
11.
Section 1702.9.5.
UPC section 1702.9.5 is amended by adding a new subsection as
follows:
1702.9.5.8
Storage
Tank Venting. A vent shall be installed on each tank. The vent shall
extend from the top of the tank and terminate a minimum of 12 inches above
grade, shall be a minimum of 1-1/2 inches in diameter, and shall be turned
downward.
Subp. 12.
1702.9.6.
UPC section 1702.9.6 is amended to read as follows:
1702.9.6
Pumps. Pumps serving
rainwater catchment systems shall be listed. Pumps supplying water to water
closets, urinals, and trap primers shall be capable of delivering not less than
15 pounds-force per square inch (psi) (103 kPa) residual pressure at the
highest and most remote outlet served. Where the water pressure in the
rainwater supply system within the building exceeds 80 psi (552 kPa), a listed
pressure-reducing valve reducing the pressure to 80 psi (552 kPa) or less to
water outlets in the building shall be installed in accordance with this
code.
Subp. 13.
Section 1702.9.7.
UPC section 1702.9.7 is amended to read as follows:
1702.9.7
Roof Drains. Primary
and secondary roof drain systems shall be designed and installed in accordance
with Chapter 11, as amended in this code. Secondary roof drains shall be
equipped with a working alarm.
Subp.
14.
Section 1702.9.8.
UPC section 1702.9.8 is amended to read as follows:
1702.9.8
Water Quality Devices and
Equipment. The rainwater catchment system shall include filtration and
disinfection to maintain the minimum water quality requirements in Table
1702.9.4. At a minimum, a 5-micron absolute filter shall be provided along with
disinfection to provide a 0.5-log inactivation of viruses. Devices and
equipment used to treat rainwater shall be suitable for rainwater catchment
system applications, properly designed, sized, and documented for the specific
project by a Minnesota registered professional engineer.
Subp. 15.
Sections 1702.9.11 and
1702.9.12.
UPC sections 1702.9.11 and 1702.9.12 are deleted in their
entirety.
Subp. 16.
Section 1702.10.
UPC section 1702.10.1 is amended to read as follows:
1702.10.1
Commercial, Industrial, and
Institutional Restroom Signs. A sign shall be installed in restrooms in
commercial, industrial, and institutional occupancies using nonpotable
rainwater for water closets, urinals, or both. Each sign shall contain 1/2-inch
(12.7 mm) letters of a highly visible color on a contrasting background. The
location of the sign(s) shall be such that the sign(s) shall be visible to
users. Each sign shall contain one of the following texts as determined by the
application:
1702.10.1(A) TO CONSERVE WATER,
THIS BUILDING USES RAINWATER TO FLUSH TOILETS AND URINALS.
1702.10.1(B) TO CONSERVE WATER, THIS BUILDING
USES RAINWATER TO FLUSH TOILETS.
1702.10.1(C) TO CONSERVE WATER, THIS BUILDING
USES RAINWATER TO FLUSH URINALS.
1702.10.1(D) TO CONSERVE WATER, THIS BUILDING
USES RAINWATER
TO *_______ *
* ______ * shall indicate the rainwater usage.
Subp. 17.
Section 1702.11.
UPC section 1702.11.2 is amended to read as follows:
1702.11.2
Cross-Connection Inspection
and Testing. An initial and subsequent annual inspection and test in
accordance with Section 1702.5 shall be performed on both the potable water
system and rainwater catchment water systems. The potable and rainwater
catchment water systems shall be isolated from each other and independently
inspected and tested to ensure there is no cross-connection in accordance with
Sections 1702.11.2.1 through 1702.11.2.4.
1702.11.2.1
Visual System
Inspection. Prior to commencing the cross-connection testing and
annually thereafter, a dual system inspection shall be conducted as follows:
Pumps, equipment, equipment room signs, and exposed piping in
an equipment room shall be inspected for visible cross-connections, proper
operation, and damage.
1702.11.2.2
Cross-Connection
Test. The following procedure shall be followed by the plumbing
contractor in the presence of the Authority Having Jurisdiction to determine
whether a cross-connection has occurred:
(1)
The potable water system shall be activated and pressurized. The rainwater
catchment water system shall be shut down and completely drained.
(2) The potable water system shall remain
pressurized while the rainwater catchment water system is completely drained.
The minimum period the rainwater catchment water system is to remain completely
drained shall be determined based on the size and complexity of the potable
water system and rainwater catchment water distribution system, but in no case
shall that period be less than one hour.
(3) Fixtures, potable water, and rainwater,
shall be tested and inspected for flow. Flow from a rainwater catchment water
system outlet indicates a cross-connection. No flow from a potable water outlet
indicates that it is connected to the rainwater catchment water
system.
(4) The drain on the
rainwater catchment water system shall be checked for flow during the test and
at the end of the testing period.
(5) The potable water system shall then be
completely drained.
(6) The
rainwater catchment water system shall then be activated and
pressurized.
(7) The rainwater
catchment water system shall remain pressurized for a minimum time specified by
the Authority Having Jurisdiction while the potable water system is completely
drained. The minimum period the potable water system is to remain completely
drained shall be based on the size and complexity of the potable water system
and rainwater catchment water distribution system but in no case shall that
period be less than one hour.
(8)
Fixtures, potable and rainwater catchment, shall be tested and inspected for
flow. Flow from a potable water system outlet indicates a cross-connection. No
flow from a rainwater catchment water outlet indicates that it is connected to
the potable water system.
(9) The
drain, on the potable water system shall be checked for flow during the test
and at the end of the testing period.
(10) Where there is no flow detected in the
fixtures that would indicate a cross-connection, the potable water system shall
be repressurized.
1702.11.2.3
Discovery of
Cross-Connection.In the event that a cross-connection is discovered, the
following procedure, in the presence of the Authority Having Jurisdiction,
shall be activated immediately:
(1) Rainwater
catchment water piping to the building shall be shut down at the meter and the
rainwater water riser shall be drained.
(2) Potable water piping to the building
shall be shut down at the meter.
(3) The cross-connection shall be uncovered
and disconnected.
(4) The building
shall be retested following procedures listed in Sections 1702.11.2.1 and
1702.11.2.2.
(5) The potable water
system shall be chlorinated with 50 ppm chlorine for 24 hours.
(6) The potable water system shall be flushed
after 24 hours, and a standard bacteriological test shall be performed. Where
test results are acceptable, the potable water system shall be permitted to be
recharged.
1702.11.2.4
Inspection. An annual inspection of the rainwater catchment water
system, following the procedures in Section 1702.11.2.1, shall be required.
Cross-connection testing, following the procedures listed in Section
1702.11.2.2, shall be required every five years.
Alternate testing requirements shall be permitted by the
Authority Having Jurisdiction.
Subp. 18. [Repealed, 40 SR 7145 SR
1007]
Subp. 19.
Section
1702.12.
UPC section 1702.12 is amended by adding the following
table:
TABLE 1702.12
Minimum Alternate Water Source Testing, Inspection, and
Maintenance Frequency
Description |
Minimum Frequency |
Inspect and clean filters and screens, and replace.
| Every three months. |
Inspect and verify that required disinfection, filters,
and water quality treatment devices and systems are operational and maintaining
minimum water quality requirements in Table 1702.9.4. |
After initial installation and monthly thereafter.
Exception: Every 12 months thereafter when electronically monitored. |
Inspect and clear debris from rainwater gutters,
downspouts, and roof washers. |
At the beginning of seasonal usage and monthly during
seasonal usage. |
Inspect and clear debris from roof or other aboveground
rainwater collection surfaces. |
At the beginning of seasonal usage and monthly during
seasonal usage. |
Remove tree branches and vegetation overhanging roof or
other aboveground rainwater collection surfaces. |
As needed. |
Inspect pumps and verify operation. |
After initial installation and every 12 months thereafter.
|
Inspect valves and verify operation. |
After initial installation and every 12 months thereafter.
|
Inspect pressure tanks and verify operation. |
After initial installation and every 12 months thereafter.
|
Clear debris from and inspect storage tanks and locking
devices and verify operation. |
After initial installation and every 12 months thereafter.
|
Inspect caution labels and marking. |
After initial installation and every 12 months thereafter.
|
Cross-connection inspection and test.* |
After initial installation and thereafter in accordance
with Section 1702.11.2.4. |
*The cross-connection test shall be performed in accordance
with this chapter by a plumber licensed under Minnesota Statutes, section
326B.46,
and certified to ASSE Standard 5120.
Subp. 20. [Repealed, 40 SR 7145 SR
1007]
Subp. 21. [Repealed, 40 SR
7145 SR 1007]
Subp. 22.
Section 1702.
UPC section 1702 is amended by adding the following
section:
1702.15
Abandonment. All rainwater catchment systems that are no longer in use
and fail to be maintained in accordance with Section 1702.12 shall be
considered abandoned-Abandoned rainwater catchment systems are subject to
Sections 1702.15.1 and 1702.15.2.
1702.15.1
General. Every abandoned rainwater catchment system or part
thereof covered under the scope of this chapter, as amended in this code, shall
be disconnected from any remaining systems, drained, plugged, and capped per
the requirements of this code. Abandoned systems must comply with chapter 11,
Storm Drainage, as amended.
1702.15.2
Underground Tank.
Every underground water storage tank that has been abandoned or otherwise
discontinued from use in a rainwater catchment system covered under the scope
of this chapter, as amended in this code, shall be completely drained and
filled with earth, sand, gravel, or concrete or removed in a manner approved by
the administrative authority.