The Jefferson County Supplement to The 1997 International Plumbing Code

After due consideration, the Jefferson County Board of County Commissioners hereby adopts and promulgates the 1997 Edition of the International Plumbing Code, with the following deletions and additions, the following items which will be known as the Jefferson County Supplement to the 1997 International Plumbing Code. The intent of this Code is to meet or exceed the requirements of the State of Colorado Plumbing Code. When technical requirements, specifications or standards in the Colorado Plumbing Code conflict, the more restrictive shall apply.

Sections 105.4 through 105.4.6  Alternate engineered design. Delete these sections in their entirety.

Sec. 106.5.2 of the Jefferson County Supplement to the 1997 International Plumbing Code is hereby deleted and the following is added:

Sec. 106.5.2 Permit Fees. The following Fee Table is to be used to determine the permit fees for all plumbing permits issued for work not in conjunction with an active building permit.

Sec.107.2 - Special Inspections. Delete Sections 107.2, 107.2.1 and 107.2.2 in their entirety.

Sec.107.4- Coordination of Inspections. Delete Section 107.4 in its entirety.

Sec.109 - Means of Appeal. Delete Section 109 in its entirety and substitute Section 105 of the Jefferson County Building Code.

Table 308.5 - Hangar Spacing. Delete reference to PB pipe or tubing.

Sec. 312.1 - Required Test. Delete last two sentences.

Sec. 312.4 - Drainage and Vent Final Test. Delete Section 312.4 in its entirety.

Sec. 312.9 - Inspection and Testing of Backflow Assemblies. Delete Section 312.9 in its entirety.

Sec. 403 - Minimum Number of Fixtures. Delete Section 403 and substitute as follows:

Sec. 403 - Minimum Number of Fixtures. The minimum number of plumbing fixtures will be as required in the Jefferson County Building Code, Appendix Chapter 29.

Table 403.1 - Minimum Number of Plumbing Facilities. Delete Table 403.1 in its entirety.

Sec. 404 - Accessible Plumbing Facilities. Delete Section 404 in its entirety.

Sec. 409.3 - Waste connection. Add Sentence: The discharge shall be through an approved air gap.

Sec. 604.3 - Water Distribution System Design Criteria. Delete Table 604.3 in its entirety.

Sec. 604.9 - Water Hammer. Delete Section 604.9 in its entirety.

Table 604.10.1 - Manifold Sizing. Delete Table 604.10.1 in its entirety.

Table 605.4 - Water Service Pipe. Delete Table 605.4 in its entirety.

Table 605.5 - Water Distribution Pipe. Delete reference to PEX, PEX-Al-PEX and PB pipe.

Sec. 605.18 - Polybutylene Pipe. Delete Sections 605.18, 605.18.1, 605.18.2 and 605.18.3 in their entirety.

Sec. 610 - Disinfection of Potable Water Systems. Delete Section 610 in its entirety.

Sec. 701.1 - Scope. Add sentence: Drainage piping shall be cast iron, galvanized steel, lead, copper, brass, Schedule 40 ABS-DWV, Schedule 40 PVC-DWV, glass or other approved material.

Sec. 702.1.2 - ABS and PVC piping shall be limited to three stories. Story is defined in Section 220 of the Jefferson County Building Code.

Sec. 702.1.3 - Copper tube for drainage and vent piping shall be not less than type DWV.

Table 702.1 - Above Ground Drainage and Vent Pipe. Delete reference to polyolefin pipe.

Table 702.2 - Underground Building Drainage and Vent Pipe. Delete reference to polyolefin pipe.

Sec. 702.3 - Building Sewer Pipe. Change reference to Table 702.2 to read Table 702.3.

Add the following section:

Sec. 705.14.7 - Expansion Joints. Expansion joints shall be accessible.

Table 706.3 - Fittings for Change in Direction. Delete reference to quarter bends.

Sec. 708.7 - Minimum Size. Delete exception.

Sec. 709.1 - Values for Fixtures. Delete reference to Table 710.1(2).

Table 710.1(1) - Building Drains and Sewers. Delete Table 710.1(1) in its entirety and substitute amended Table 710.1(1) as follows.

TABLE 710.1(1) AMENDED

Maximum Unit Loading and Maximum Length of Drainage and Vent Piping
Size of Pipe, inches	1-1/4	1-1/2	2	2-1/2	3	4	5	6	8
Maximum Units
*1 Drainage Piping
Vertical	1	*2 2	*3 16	*3 32	*4 48	256	600	1380	3600
Horizontal	1	1	*3 8	*3 14	*4 35	*5 216	*5 428	*5 720	*5 2640
Maximum Length
Drainage Piping
Vertical, feet	45	65	85	148	212	300	390	510	750
Horizontal (Unlimited)
Vent Piping
Horizontal and Vertical
Maximum Units	1	*3 8	24	48	84	256	600	1380	3600
Maximum Lengths, feet	45	60	120	180	212	300	390	510	750

(See Note)

*1. Excluding trap arm.

*2. Except sinks, urinals and dishwashers.

*3. Except six-unit traps or water closets.

*4. Only four (4) water closets or six-unit traps allowed on any vertical pipe or stack; and not to exceed three (3) water closets or six-unit traps on any horizontal branch or drain.

*5. Based on one-fourth (1/4) inch per foot (20.9 mm/m) slope. For one-eighth (1/8) inch per foot (10.4 mm/m) slope, multiply horizontal fixture units by a factor of 0.8.

Note: The diameter of an individual vent shall not be less than one and one-fourth (1-1/4) inches (31.8 mm) nor less than one-half () the diameter of the drain to which it is connected. Fixture unit load values for drainage and vent piping shall be computed from Tables 709.2 and amended Table 710.1(1). Not to exceed one-third (1/3) of the total permitted length of any vent may be installed in a horizontal position. When vents are increased one (1) pipe size for their entire length, the maximum length limitations specified in this table do not apply.

Table 710.1(2) - Horizontal Fixture Branches and Stacks. Delete Table 710.1(2) in its entirety.

Sec. 711.1.1 - Omission of Vents for Vertical Offsets. Delete Section 711.1.1 in its entirety.

Sec. 711.3  Horizontal stack offsets. Delete Item #3 in its entirety.

Sec. 711.3.1 - Omission of Vents for Horizontal Stack Offsets. Delete Section 711.3.1 in its entirety.

Sec. 712.2 - Check and Gate Valve Required. Delete exception in its entirety.

Sec. 712.3.1 - Sump Pump. Add sentence: In public use occupancies, dual pumps will be required and shall be arranged to function independently in case of mechanical failure.

Sec. 712.4.1 - Capacity. Exception: Delete exception in its entirety.

Sec. 714 - Computerized Drainage Design. Delete Section 714 in its entirety.

Sec. 802.4 - Standpipes. Add sentence: Traps shall not be located below the floor.

Sec. 901.6 - Engineered Systems. Delete Section 901.6 in its entirety.

Sec. 904.1 - Roof Extension. Insert number 6" inches.

Sec. 904.6 - Extension through Wall. Delete Section 904.6 in its entirety.

Sec. 905.1 - Connection. Delete the exception.

Sec. 905.2 - Grade. Add sentence: Horizontal vent pipes may be run level.

Sec. 905.4 - Vertical Rise of Vent. Delete Section 905.4 in its entirety and substitute as follows.

Sec. 905.4 - Vertical Rise of Vent. Every dry vent shall rise vertically to a minimum of 6 inches above the flood level rim of the highest trap or trapped fixture being vented unless drainage fittings are used.

Sec. 905.6 - Side Inlet. Delete Section 905.6 in its entirety and substitute as follows:

Sec. 905.6 - Side Inlet. Side inlet closet bends are prohibited.

Table 906.1  Delete Table 906.1 and substitute as follows:

Table 906.1

Horizontal Distance of Trap Arms
(Except for water closets and similar fixtures)*

Slope one-fourth (1/4) inch per foot

* The developed length between the trap of a water closet or similar fixture (measured from the top of the closet ring [closet flange] to the inner edge of the vent) and its vent shall not exceed six (6) feet.

Sec. 908.2 - Connection at the Same Level. Delete Section 908.2 and substitute as follows:

Sec. 908.2 - Connection at the Same Level. Where the fixture drains being common vented at the same level, the vent connection shall be at the interconnection of the fixture drains.

Sec. 909 - Wet Venting. Delete Section 909 in it entirety and substitute as follows:

Sec. 909  Wet Venting

Sec. 909.1- Horizontal Wet Venting. Single bathroom groups  a single bathroom group of fixtures may be installed with the drain from an individually vented lavatory or lavatories serving as a wet vent for a bathtub, shower compartment, or floor drain and for a water closet provided the requirements listed below are met.

1. Not more than four fixture units drain into a minimum 2 inch diameter wet vent. Kitchen sinks, dishwashers, or automatic clothes washer connections are not permitted.

2. The horizontal branch drain connects to the stack at the same level as the water closet drain, or it may connect to the upper half of the horizontal portion of the water closet bend at an angle not greater than 45 degrees from the direction of flow.

Table 909.3 - Wet Vent Size. Delete Table 909.3 in its entirety.

Sec. 910 - Waste Stack Vent. Delete Section 910 in its entirety.

Table 910.4 - Waste Stack Vent Size. Delete Table 910.4 in its entirety.

Sec. 911 - Circuit Venting. Delete Section 911 in its entirety.

Sec. 912 - Combination Drain and Vent System. Delete Section 912 in its entirety.

Table 912.3 - Size of Combination Drain and Vent Pipe: Delete Table 912.3 in its entirety.

Sec. 913.2 - Vent Connection. Add sentence: A foot vent with a cleanout shall be installed immediately above the junction of the island fixture vent and drain.

Sec. 916.1 - Size of Stack Vents and Vent Stacks. Change reference to Table 916.1 to read amended table710.1(1).

Table 916.1 - Stack Vents and Vent Stacks. Delete Table 916.1 in its entirety.

Sec. 917 - Air Admittance Valves. Delete Section 917 in its entirety.

Sec. 918 - Engineered Vent Systems. Delete Section 918 in its entirety.

Sec. 1002.4 - Trap Seals. Delete Section 1002.4 and substitute as follows:

Sec. 1002.4 - Trap Seals. Each fixture trap shall have a liquid seal not less than 2 inches or more than 4 inches. Where a trap seal is subject to loss by evaporation, a trap seal primer valve shall be installed.

Sec. 1201.2 - Fuel Piping Systems. Delete Section 1201.2 and substitute as follows:

Sec. 1201.2 - Fuel Piping Systems. All fuel piping systems shall be sized, installed, tested and placed in operation in accordance with the requirements of the 1997 Uniform Mechanical Code, Chapter 13, Fuel-Gas Piping.

The following Appendix Chapters to the International Plumbing Code, 1997 Edition, are hereby adopted and enforced by Jefferson County, Colorado. No other appendix chapters are adopted.

Appendix Chapter B - Rates of Rainfall for Various Cities.

Appendix Chapter D - Degree Day and Design Temperatures for Cities in the United States.

Appendix Chapter F - Structural Safety.

Last Modified: Mar 28, 2009 10:16 PM