Centennial WSD 1996 WCPlan

• Project Type: Water Conservation Plan
• Project Name: Centennial Water & Sanitation District Water Conservation Plan
• Title: Water Management Study
• Date: 8/10/1995
• County: Arapahoe
• Water Conservation - Doc Type: Complete Plan

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Previously, low water use plumbing fIxtures were the standard type of fIxture
manufactured within this country. These fIxtures, largely available in all home improvement
and hardware stores prior to 1994, consisted of 3.5 gallon toilets, 3 gallon per minute
showerheads, and 2.5 gallon per minute faucets. In addition, many non-conserving showerheads
and faucets manufactured in this country were also available.

New plumbing standards proposed for the District are based on criteria established under
the Federal Energy Policy Act of 1992. Through this act, legislation mandated the manufacture
of ULV toilets and fIxtures in the United States effective January 1994. As a result, fixtures
manufactured in this country which are available in home improvement centers and hardware
stores meet the Energy Policy Act criteria. This measure helps to ensure that these fIxtures are
used for new construction within District service boundaries.

Conservation criteria for indoor plumbing are as follows:

The maximum water use for any fIxture, when measured with a flowing water pressure
of 80 pounds per square inch, is as follows:

Showerheads
Lavatory faucets
Kitchen faucets
Kitchen aerators
Metering faucets

2.5 gallons per minute
2.5 gallons per minute
2.5 gallons per minute
2.5 gallons per minute
0.25 gallons per cycle

The maximum water use allowed, in gallons per flush (gpt), for water closets and urinals
is specified as follows:

Gravity tank-type toilets
Flushometer tank toilets
_ _ J~l~tr.oJIl~hanical hydrnnlic.toi1ets
Blowout toilets
Urinal

1. 6 gpf
1.6 gpf
- -- - L.4 gpf- - -
3.5 gpf
1.0 gpf

In addition, the regulation will also encourage the voluntary installation of the following:

· Low-water-use dishwashers and clothes washers
· Insulated hot water pipes
· Minimized hot water pipe runs

The feasibility of converting to UL V fIxtures has been scrutinized in recent years.
Studies have shown that these fIxtures have no significant adverse impacts on the perfonnance
of sewer laterals and the sewage treatment plant, provided the plant is designed to handle higher
concentrations of organic loadings. In fact, the Marcy Gulch Treatment Plant is designed to
effectively treat higher organic waste strength and reduction in flows may extend the useful life
of the existing facilities.

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