B26 HW Recirc - Plumbing Floorplan-M-3.pdf

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Attached to
B26 Hot Water Recirculation Federal contract opportunity
Solicitation number
NB194000-26-00820
Issued by
Department of Commerce National Institute of Standards and Technology

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This is a plumbing floor plan design document for Building B26 Hot Water Recirculation system at the National Institute of Standards and Technology (NIST) facility located at 325 Broadway, Boulder, Colorado 80305-3328. The plan was prepared by the Boulder Design and Construction Division with drafting by Reese and an approval date of 2/17/2026.

The design specifies installation of a new hot water recirculation system featuring a new pump equipped with an aquastat and timeclock control. The system includes new hot water circulation piping (indicated as "NEW HW CIRC LINE") in 3/4-inch and 1/2-inch diameter lines throughout the building, with existing hot water lines (marked "EXISTING HW LINE") integrated into the design. Balancing valves (typical) are specified at multiple locations to regulate flow. The floor plan provides a detailed layout showing the routing of these piping systems across the building's multiple rooms and corridors, with specific connection points and fixture locations marked for proper installation and maintenance access.

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Other files attached to B26 Hot Water Recirculation, newest first.
File Type Posted
SS Notice.docx DOCX document
B26 HW Recirc Line SOW.docx DOCX document

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PROVIDE NEW PUMP WITH

AQUASTAT AND TIMECLOCK.

SEE DETAIL.

PROVIDE NEW PUMP WITH

AQUASTAT AND TIMECLOCK.

SEE DETAIL.

PROVIDE NEW BALANCING

VALVE (TYP.)

EXISTING HW LINE (TYP.)

NEW HW CIRC LINE (TYP.)

3/4" 1/2"

1/2"

1/2"

1/2"

SHEET NUMBER

PROJECT NAME of

325 BROADWAY BOULDER, COLORADO 80305-3328

NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

DATEDESIGN APPROVAL

BOULDER DESIGN AND CONSTRUCTION DIVISION

DATESUPV.BYDESCRIPTIONREVISION

3 DRAFTING

ADDITIONAL TUNNEL HEAT

REESE

PLUMBING FLOORPLAN

B26 HOT WATER RECIRCULATION

2/17/2026

P-1REESE

FLAG NOTES X :

1. XX

AutoCAD SHX Text

BUILDING 26 KEY PLAN

AutoCAD SHX Text N.T.S.

Sheets and Views
M-3

File details come from the government source that posted it. Updated .