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Chapter 10-10: Plumbing Code1

10-10-1  Legislative Intent. Go to the top

The purpose of this chapter is to protect the public health and safety by regulating the installation, alteration, and repair of plumbing devices in structures in the city. The city council hereby adopts the 2012 edition of the International Plumbing Code with certain amendments and deletions thereto found to be in the best interests of the residents of the city.

Ordinance Nos. 4984 (1986); 5177 (1989); 5493 (1992); 5781 (1996); 7566 (2007); 7925 (2013)

10-10-2  Adoption of the International Plumbing Code With Modifications. Go to the top

(a)  The 2012 edition of the International Plumbing Code, published by the International Code Council, including Appendix E, "Sizing of Water Piping System," is hereby adopted by reference as the City of Boulder Plumbing Code or plumbing code, and has the same force and effect as though fully set forth in this chapter, except as specifically amended by the provisions of this chapter.

(b)  Except for sections 101, 102, and 107, Chapter 1 is repealed. This code shall be administered in accordance with Chapter 1, "Administration," of the International Building Code as adopted, with amendments, by Section 10-5-2, "Adoption of International Building Code With Modifications," B.R.C. 1981.

(c)  Section 101.1, "Title," is repealed and reenacted to read:

101.1 Title. These regulations shall be known as the Plumbing Code for the City of Boulder or plumbing code and will be referenced herein as "this code."

(d)  The Exception to Section 301.3, "Connections to drainage system," is deleted in its entirety.

(e)  Section 312.5, "Water supply system test," is amended by deleting the words "for piping systems other than plastic" and by modifying the test pressure required from 50 psi (344 kPa) to 100 psi (688 kPa).

(f)  Section 504.7.1 "Piping for safety pan drains shall be of those materials listed in Table 605.4," is repealed.

(g)  Section 610, "Disinfection of potable water system," is repealed.

(h)  Section 605.3 is amended by adding a new paragraph to read:

Water service line pipe between the water meter and building shall be Type K copper if it is in the public right of way, a public utility easement, or on other public property.

(i)  Section 712.4.2, "Capacity," is amended by the addition of a new sentence to read:

Sewage pumps and sewage ejectors serving public fixtures shall be provided with dual pumps and ejectors arranged to operate independently in case of overload or failure.

(j)  Section 903.1, "Roof extension," is repealed and reenacted to read:

903.1 Roof extension. Open vent pipes that extend through a roof shall be terminated not less than 6 inches above the roof, except that where a roof is to be used for any purpose other than weather protection, the vent extensions shall terminate not less than 7 feet above the roof.

(k)  Section 1003.1, "Where required," is amended by adding the following:

Grease, oil, and sand interceptors shall hold a minimum capacity of 750 gallons and shall be remotely located.

(l)  Section 1003.3, "Grease interceptors," is amended by adding the following:

Grease interceptors shall not receive the drainage and retain grease from more than four fixtures. A grease interceptor shall not be connected to heated water fixtures, including, without limitation, dishwashers, and shall not be connected before waste disposal units, including, without limitation, garbage disposals and grinders.

(m)  Section 1003.4, "Oil separators required," is repealed.

(n)  Section 1101.3, "Prohibited drainage," is repealed and reenacted to read:

1101.3 Prohibited drainage. No rain, surface, or subsurface water shall be connected to or discharged into any drainage system, unless first approved by the code official.

(o)  Section 1106.1, "General," is repealed and reenacted to read:

1106.1 General. The size of the vertical conductors and leaders, building storm drains, building storm sewers, and any horizontal branches of such drains or sewers shall be based on the 100-year hourly rainfall rate of 2.5 inches per hour or other approved local weather data.

(p)  Chapter 13, "Gray Water Recycling Systems," is deleted in its entirety.

(q)  Table E103.3(2), "Load Values Assigned to Fixtures," is amended by the addition of a new sentence to read:

For the purpose of determining the largest instantaneous demand required in order to size a water meter, or for determining the amount of the plant investment fee, this table is repealed and replaced by the Fixture Unit/GPM Demand Chart and PIF Computation Sheet found at Appendix A to Chapter 11-1, "Water Utility," B.R.C. 1981.

(r)  Table E103.3(3), "Table for Estimating Demand," is amended by the addition of a new sentence to read:

For the purpose of determining the largest instantaneous demand required in order to size a water meter, or for determining the amount of the plant investment fee, this table is repealed and replaced by the Fixture Unit/GPM Demand Equations and PIF Computation Sheets found at Appendix A to Chapter 11-1, "Water Utility," B.R.C. 1981.

Ordinance Nos. 4879 (1985); 4984 (1986); 5050 (1987); 5177 (1989); 5493 (1992); 5781 (1996); 6065 (1999); 6065 (1999); 7024 (1999); 7566 (2007); 7925 (2013)


1 Adopted by Ordinance No. 4636. Amended by Ordinance Nos. 4326, 4501.