Install Instructions

14
Figure 11: Vertical Vent Installation
Figure 10: Horizontal Vent Terminal
V. Venting (continued)
fromoutside.Secureoutsideangetowallwith
nails or screws, and seal with adhesive material.
Installinsideangetoinsidewall,securewithnails
or screws, and seal with adhesive material.
5. For noncombustible wall when thimble is not used,
size opening such that female (bell) end with
locking band attached cannot pass through.
6. Join vent terminal to vent pipe. Locate vent pipe
suchthatbell/lockingbandisushwithoutsidewall
(oroutsideangeofthimble,ifused)whenjoinedto
inside vent piping. See Figure 10.
7. Insert vent pipe through thimble/opening from
outside and join to vent system. Apply sealant
between vent pipe and opening/thimble to provide
weathertight seal.
H. Vertical (Through Roof) Vent Installation
1. Install vertical vent drain tee. See Figures 11 and 12.
Attach tee directly to elbow or horizontal pipe from
elbow.
2. Slope horizontal runs minimum ¼ inch per foot.
Slope toward vertical vent drain tee. Position weld
seams in vent pipes in all horizontal runs at the top
to avoid condensate from lying on the seams.
3. Installrestopsatoorandceilingwherevent
passesthroughoor,ceiling,orframedwall.The
restopmustclosetheoororceilingopening
between vent pipe and structure.
4. Enclose vent passing through unoccupied or
occupied spaces above the boiler with materials
havingareresistanceratingatleastequaltothe
ratingofadjoiningoororceiling.Maintain
minimum clearance to combustible materials.
 Note:Forone-ortwo-familydwellingsre
resistance rating requirement may not need to be
met, but is recommended.
5. Whenever possible install vent straight through roof.
Refer to Figure 13 if offset is necessary. Maintain
minimum clearance to combustible materials.