21 11 00 FACILITY FIRE-SUPPRESSION WATER-SERVICE PIPING

.01 Piping

1. Piping shall be pitched and valves installed to facilitate complete drainage of the system.
2. All piping run within the building shall be run concealed in the finished portions of building in pipe spaces, ceilings or furred chases and exposed only in mechanical rooms and where shown on the drawings.
3. No pipe shall pass in front of or interfere with any openings, door or window.  Head room in front of openings and doors shall in no case be less than the top of the opening.
4. Piping shall not pass exposed through electrical rooms or be erected over any switchboard or other electrical gear.
5. Sleeves:
1. All pipes passing through wall or floor construction shall be fitted with sleeves.  Each sleeve shall extend through its respective floor, wall or partition and shall be cut flush with each surface unless otherwise specified.  Sleeves shall be two pipe sizes larger than the pipe when un-insulated and of sufficient size to allow for the insulation without binding.  Floor sleeves in mechanical rooms shall extend 4 inches above finished floor, all other spaces minimum one inch above finished floor.
2. Sleeves in bearing walls, masonry walls, masonry partitions, and floors shall be standard weight steel pipe finished with smooth edges.  For other than masonry partitions, through suspended ceilings and for concealed vertical piping, sleeves shall be No. 22 USG galvanized steel.
3. Where pipes pass through waterproofed floor or walls, design of sleeves shall be such that waterproofing can be flashed into and around the sleeves.
4. Sleeves through exterior walls below grade shall have the space between pipes and sleeves caulked watertight.
5. Install one-piece chrome-plated escutcheon plates with set screw at sleeves for all pipes exposed in finished areas.
6. The annular space between sleeves and pipe shall be filled with fiberglass insulation and caulked in non-fire rated situations.
7. Where pipes pass through fire-rated floors, walls, or partitions, the use of a UL approved system for through penetrations is required.  The annular space around the pipes shall be packed with mineral wool or other noncombustible material and sealed at each exposed edge to maintain the rating of the system in accordance with the through penetration sealant manufacturer's recommendations.
6. System and Equipment Drains:
1. All piping shall be arranged to completely drain the system.  Drain locations shall be located at all system low points.
2. Where sectionalizing valves are installed, a drain shall be installed on downstream side of valve to drain that section of the system.
3. All system and equipment drains are to be piped to a floor drain.

.04 Automatic Source and Siamese Connections

1. Water systems should be supplied from at least one automatic source and siamese connections.
2. Verify siamese location and size requirements with the University Fire Protection Engineer and local fire department.
3. Siamese connections are two-way 2 1/2" National Standard thread fire connection with individual clappers at University Park.
4. Where street pressure is sufficient (as determined from hydrant flow test), use it as the automatic source for the system or the lowest zone.
5. Where everyday static pressures in the system exceeds allowable limits, the system should be zoned to comply with the maximum pressures allowed by code and/or NFPA.
6. Where street pressure is insufficient, the automatic source should be automatic fire pumps.
7. If a fire pump is required, a jockey pump is also needed.  Cross connections (potable and nonpotable water supplies) should be avoided.

.05 Pressure-Reducing Valves

1. At levels where a pressure of over 170 psi could occur during a fire, provide approved pressure-reducing valves (pilot-operated type) on the standpipe and/or sprinkler connections.
2. Provide fixed orifice-type pressure reducers on 1 1/2" valves where required, and adjustable orifice-type on 2 1/2" valves where required.  The use of approved pressure-reducing hose valves on NFPA design systems increases the allowable zone height from 275 to 400 feet.

.06 Piping (Inside Building)

1. Piping inside building shall conform to NFPA Standard 13 or 14.  If pressure is over 175, use extra heavy fittings.
2. Piping subject to alternate wetting and drying, such as drain piping, test piping, siamese connections between siamese and check valve shall be galvanized, Schedule 40, and properly sloped to completely drain.
3. Avoid running wet pipe systems in areas exposed to freezing.  If it is absolutely necessary to run piping in a freezing area, it should be on a dry pipe system or anti-freeze system.
4. Dry pipe system shall use galvanized pipe, Schedule 40, properly sloped to completely drain.
5. Wet pipe systems may be Schedule 10, black steel, except maintain Schedule 40 from water entrance main to backflow preventer.

.07 Valves

1. Valves should be IBBM or cast steel as follows:
1. Fire pump discharge check valves should be spring type when the lift to the top of the system is 35 feet or more.
2. Control valves 6 inches and larger, except at fire pumps should be provided with bypass valves.