Instructions / Assembly

TUUBER™
DUAL-SEAL 20™
AIR ADMITTANCE VALVE
Product Description
174015 1½" Dual-Seal 20 AAV maximum DFU rating
Individual and Branch 3 DFU, Stack 6 DFU
174020
2" Dual-Seal 20 AAV maximum DFU rating
Individual and Branch 6 DFU, Stack 24 DFU
TECHNICAL SPECIFICATIONS
Engineering Specification: The intended purpose of an air
admittance valve is to provide a method of allowing air to enter a
plumbing system as an alternative to a vent extended outside a
building to outside air and to prevent plumbing system sewer gases
from entering inside a building and to protect against siphonage of a
plumbing fixture trap.
Code Approvals:
International Plumbing Code (IPC)
International Residential Code (IRC)
Uniform Plumbing Code (UPC
Section 301.2)
Standards Compliance:
ANSI/ASSE 1050 (stack type)
ANSI/ASSE 1051 (individual
& branch type)
Pat.Antiairlock.com
INSTRUCTIONS: Read all installation instructions prior to the use of this product. Air admittance valve are
not a substitute for all conventional venting situations. It is important to consult local codes prior to
installing an air admittance valve. Every structure in which plumbing is installed must have at least one
primary stack vent. The stack vent should run as directly as possible from the building
drain to open air.
TUUBER™ Dual-Seal 20 air admittance valve (TUUBER™ AAV) are an alternative to Individual, Branch
and Vent Stack venting.
TUUBER™ AAV must be installed in an accessible location and remain accessible to allow free air passage
and inspection.
TUUBER™ AAV must be installed in a vertical and upright orientation not to exceed 15 degrees from
vertical plumb.
TUUBER™ AAV installed for Individual or branch venting must connect to the horizontal drainage branch
pipe and be installed a minimum of 4” above the top of the horizontal drainage branch pipe or trap being
vented and located on the same floor level. Example shown in Fig. 1.
TUUBER™ AAV installed for Vent Stack venting must be located a minimum of 6” above the flood level
rim of the highest fixture or trap being vented and located on the same floor level. Example shown in Fig. 2.
TUUBER™ AAV must be located within the maximum developed length allowed for the vent.
TUUBER™ AAV must be installed in a building having at least one main vent not to exceed four (4) branch
intervals from the top of the main vent. A branch interval is a distance along a waste or soil stack,
corresponding in general a story height, (at least 8 feet) within which a horizontal drain branches from one
floor or one story of a structure are connected to the stack.
Where TUUBER™ AAV are installed in a building greater than 5 stories or exceeding four (4) branch
intervals from the top of the main vent the horizontal branch(s) where the TUUBER™ air admittance valve
are installed shall be provide with a relief vent extending outside to open air or reconnected to the stack vent
between stack vent and the most downstream fixture or trap connected to the horizontal branch(s) vented by
TUUBER™ air admittance valve.
TUUBER™ AAV are for use in temperatures between -40°F and 150°F. TUUBER™ AAV can be installed
at rough-in or finish stage and are for use in existing and new plumbing drainage systems.
TUUBER™ AAV must not be used as a relief vent. TUUBER™ AAV must not be installed to serve as a
vent in chemical waste or special waste systems. TUUBER™ AAV must not be installed in supply or return
air plenums. TUUBER™ AAV must not be installed outside of a building or subject to outdoor conditions.
Use approved thread sealant on the threads of the TUUBER™ AAV.
TUUBER™ AAV must be installed inside of a building. TUUBER™ AAV installation must be in
accordance with manufacturer’s installation instructions and local code requirements.
FIXTURE APPLICATIONS
DFU
LOAD
Traditional public Bathroom group having a
Toilet (1.6 gpf), bathtub with shower, and sink.
6
Traditional private Bathroom group having a
Toilet (1.6 gpf), bathtub with shower, and sink.
5
One public Toilet (1.6 gpf) 4
One private toilet (1.6 gpf) 3
Washing Machine 3
Bathtub with shower 2
Kitchen sink 2
Dishwasher 2
Shower (not greater than 5.7 gpm) 2
Bathroom sink 2
Drinking fountain 0.5