substitution request - Alliance Construction Solutions

5. Install piping at right angles, parallel or at right angles to the building walls, and
as high as possible. Diagonal runs are not permitted, unless expressly indicated.
6. Conceal all pipe installations in walls, pipe chases, utility spaces, above ceilings,
and below grade or floors, unless indicated to be exposed to view.
7. Install piping tight to slabs, beams, joists, columns, walls, and other permanent
elements of the building. Provide space to permit insulation application, with 1”
clearance outside the insulation. Allow sufficient space above removable ceiling
panels to allow for panel removal.
8. Locate groups of pipes parallel to each other, spaced to permit application of
insulation and servicing of valves.
9. Provide for complete drainage of water systems. At all low points in mains, risers,
and branch lines, provide drains consisting of a tee fitting, 3/4” ball valve, and
short 3/4” threaded-end nipple and cap with chain.
10. Install all piping free of sags or bends and with ample space between piping to
permit proper insulation application.
11. Fire and Smoke Wall Penetrations: Where pipes pass through fire and smoke
rated walls, partitions, ceilings, and floors, maintain the fire and smoke rated
integrity. Refer to Division 15, Sections 15120 and 15050 for materials.
12. Exterior Wall Penetrations: Seal pipe penetrations through exterior walls using
sleeves and mechanical sleeve seals (see Section 15120). Pipe sleeves smaller
than 6 inch shall be steel; pipe sleeves 6 inch and larger shall be sheet metal.
13. Anchor piping to ensure proper direction of expansion and contraction.
14. Coordinate penetrations through foundation and all other structural penetrations
with structural engineer.
15. Install hangers and guides as necessary to provide piping systems which are selfsupporting
and not dependent upon connection to equipment. All piping shall be
adequately supported from the building structure with adjustable hangers to
maintain uniform grading where required and to prevent sagging and pocketing.
16. Allow flexibility in the erection of the piping system in order to prevent excessive
stresses in materials and joints due to thermal expansion or equipment vibration.
Provide sufficient swing joints, anchors, expansion loops, expansion joints, and/or
other devices as necessary, and install so as to permit free expansion and
contraction without causing undue stresses. Make all changes in direction with
fittings. Support piping independently at all equipment so that its weight shall not
be supported by the equipment. Provide bracing where necessary to prevent
swaying.
17. At high points of all piping, install manual air vents consisting of a line size nipple
6 inches long for an air collection chamber, pipe cap on top of nipple with 1/4
inch top, and 1/4 inch copper tubing with gauge cock. Locate gauge cock at
accessible location and anchor to adjacent pipe or wall. Provide access panels as
required for access.
18. Provide shutoff valves and unions or flanges to isolate each item of equipment,
branch circuit, or section of piping. Unions shall be provided at each threaded
valve (manual or automatic) and at all equipment having threaded connections.
19. Arrange piping and valves near each piece of equipment to allow for complete
service and maintenance of the equipment without disturbing the shutoff valves.
20. Provide dielectric unions or "Clearflow" fittings at all junctions of dissimilar metals
in fresh water systems.
21. Use full lengths of pipe; short lengths with couplings will not be permitted. All
pipe sections shall be de-burred to full I.D. before joining.
22. Extend chains for valve operators to 6'-3" above the floor or platform. Brace
extension handles and provide a means of indicating open and closed positions.
23. All piping installed below grade (unless factory pre-insulated) shall be spiral
wrapped with 10 mil PVC tape (Scotchwrap No. 50 or equal) with 50% overlap,
Project No.: 10145
550 15 th Street Dual Brand Hotel
12/23/2011
22 1116 - 10 BASIC PLUMBING PIPING