Rev. 13 November 1, 2016
Page | 49c. Install all water ha mmer arrestors in an upright position.- Valves
a. All valves 3” diameter and less shall be quarter-turn, two-piece ball valves with bronze full-port body with
sweat connections and valve extensions for application of insulation.
b. For valves above 3”, typically Watts series G4000-FDA or equivalent flanged valves shall be installed. For
valves above 3” where space limita tions dictate a mor e compact valve and whe re approv ed by the
Owne r, install AMRI Isoria 16 butterfly valves with lug style body, ductile ir on body material, 420 stainless
steel shaft, 316 stainless steel disc, with a chemical resistant l iner of Viton, and NR 16 5 aluminum handles.
c. All valves shall be tagged. Coordinate the specific numbering sequence with the
Owner’s Rep. during t he construction phase. - Other
a. Coordinate all pre-startup chlorination with the U of I Water Department.
b. Insulate all domestic cold water systems. For typical cold water systems use fiberglass insulation with
all-service jacketing. Install additional jacketing at locations where physical protection is required.
c. Install drain valves at the bottom of all risers.
d. All lavatory supply stops shall be 1/2” fip x 3/8” compression, 1/4 turn ball valve style. Sweat or
compression stops are not acceptable. Lavatory supply stops shall be Keeney models 2048pc, 2058pc or
equal. - Domestic Hot Water Systems
a. Install the hot water recirculating lines for all plumbing fixtures such that they are no more than ten feet from
the end of an individual branch run. For locations where sensor-operated faucets are approved by the Owner:
i. Install the hot water recirculating lines such that they are no more than six inches from the supply stop
for that fixture.
ii. Install an isolation valve above ceiling for the hot water recirculating line.
b. Mixing valves shall have check valves downstream of its shut-off valves.
c. Install combination balancing/flow measurement valves on the hot water recirculating piping:
i. At each horizontal main where it attaches to its riser.
ii. At other points where required.
iii. The location of these combination balancing/flow valves shall be accurately shown on all as-
built drawings. Any mixing valve installed in conjunction with an electronic faucet shall be piped
with flexible stainless steel supplies and stops; rigid piped supplies are not acceptable.
d. All hot water and hot water recirculating branches shall parallel the cold water: the hot water recirculating
piping shall be designed as a reverse return system.
e. All hot water and hot water recirculating systems shall have their design velocities limited to 4 feet per second
to prevent erosion-corrosion.22 13 00 Facility Sanitary Sewerage22 13 16 Sanitary Waste and Vent Piping Systems- Materials