TRIM OFF HERE
Ultr
a mo
del
Ven
t or air pip
e siz
e
• Allowable sizes of vent/air piping • Max. equivalent feet of each
• Number of elbows allowed at these lengths
(All applications include allowance for the termination.)
Sidewall
Direct Vent
with
Weil-McLain
Vent/air cap
Sidewall Direct Vent
with
Separate Pipes
— or —
Sidewall or Vertical
Direct Exhaust
Sidewall or Vertical
Direct Vent
3” PVC Concentric
(Use only PVC pipe DO
NOT use CPVC or ABS)
[Note 1]
Sidewall or Vertical
Direct Vent
4” PVC Concentric
(Use only PVC pipe DO
NOT use CPVC or ABS)
[Note 1]
Vertical
Direct Vent
with
Separate
Pipes
Length Ells
Length
Ells
Length
Ells
Length
Ells Length Ells
80 or
105
2” ** 100
(ab)
2
100
2
100
(ab)
1
NA
100
(a)
1
3”
100
2
100
2
100
1
NA
100
1
155
3”
100
2
100
2
100
1
NA
100
1
230
3”
30
(c)
2
30
(c)
2
30
(c)
1
30
(c)
1
30
(c)
1
4” 100
(d)
2
100
2
70
(d)
1
70
(d)
1
100
1
299
4”
100
2
100
2
70
(d)
1
100
1
100
1
399
4”
100
2
100
2
NA
100
1
100
1
Equivalent feet for elbows — deduct from maximum equivalent length of piping:
• 7 feet per for each 4-inch elbow & 2 or 3-inch 90° long-radius or 45° elbow
• 16 feet for each 2- or 3-inch short-radius elbow
a —
Use 3"x2" reducer at boiler
b —
Use 3”x2” PVC reducers at termination
c —
Use 4”x3” reducer at boiler
d —
Use 4"x3" PVC reducers at termination
Stainless (AL29-4C) vent pipe
— install an adapter at the boiler for all applications. Also install an
adapter at the termination unless using separate-pipe termination.
** Ultra-80 and 105 boilers installed with 2-inch vent piping automatically derate due to the pres-
sure loss in the vent and air piping. The derate ranges up to 10% for the Ultra-80 at 100 feet or
15% for the Ultra-105 at 100 feet.
Note 1: IPEX 3” and 4” PVC concentric vent kits can be used with standard PVC pipe, fittings and
cement (ANSI/ASTM D1785) except where ULC S636 compliance is required. For ULC S636 compli-
ance, all pipe, fittings and cement must be IPEX System 636. When using IPEX kits, use only IPEX
product code 196006 for 3” venting or IPEX product code 196021 for 4” venting.
Contact Weil-McLain for ordering information and availability of Weil-McLain venting kits.
Items
Material
Standards for installations in:
United States
Canada
PLASTIC
piping materials (vent or air piping)
Pipe
&
Fittings
PVC schedule 40
ANSI/ASTM
D1785
Plastic vent pipe
must be certified
to ULC S636 when
required.
(Note 2)
Air pipe can be
any of those
listed at left if
acceptable for
local codes.
PVC-DWV
(Note 1)
D2665
CPVC sch 40
(Note 1)
F441
ABS-DWV sch 40
(Note 1)
D2661
Cement
PVC
D2564
CPVC
(Note 1)
F493
ABS
(Note 1)
D2235
Primer
PVC, CPVC or ABS
F656
AL29-4C
piping materials
Vent
pipe
Heat Fab, Inc. Saf-T-Vent
®
Z-Flex, Inc. Z-Vent II
Simpson Dura-Vent FasNSeal
™
Certified for Category IV and
direct vent appliance venting
Note 1:
DO NOT use DWV, CPVC or ABS when using concentric vent ter-
mination. Use ONLY PVC schedule 40.
Note 2:
IPEX PVC concentric terminations utilize PVC pipe/fittings certified
to ULC S636. Where ULC S636 compliance is required, use only IPEX
System 636 pipe, fittings and cement.
AL29-4C vent piping — Install a PVC-to-stainless adapter supplied
by the vent pipe manufacturer at the boiler vent connection and
at the termination (when using Weil-McLain plate or concentric
PVC termination). DO NOT mix piping from different vent pipe
manufacturers unless using adapters specifically designed for the
purpose by the manufacturer.
Plastic piping — Do not attempt to connect different types of
plastic piping together.
DO NOT use cellular core pipe.
All vent and air pipes require a bird screen at each termination
where specified in the manual or vent supplement.
Material checklist — vent and air piping
NOTE: Also obtain all required flashings, boots, thimbles, fire stops or
other items required for wall, ceiling and roof penetrations.
QUICK-START
QUICK-START
Pipe and fittings — PLASTIC
Material —
PVC
CPVC
ABS
Size —
2”
3”
4”
ITEM
QTY
✔
Straight pipe
feet
Elbows, 90-degree
(include termination elbows if required)
Couplings
(include termination if vertical separate pipes)
Return bend, 180-degree
(vertical separate-pipe termination)
1
Reducers: 3"x2"
4"x3"
Pipe and fittings — AL29-4C Stainless
Product —
Saf-T-Vent
®
Z-Vent II
FasNSeal™
Size —
2”
3”
4”
ITEM
QTY
✔
Straight pipe
feet
Adjustable lengths
Elbows, 90-degree
Termination elbows (with integral screen), when req’d
Elbows, 45-degree
Adapter at boiler (to fit diameter of boiler connection)
Adapter at termination, if required
Items required
(DV=Direct Vent; DE=Direct Exhaust)
W-M P/N
QTY
✔
Sidewall with Weil-McLain Plate
W-M sidewall term. kit 3"
•
4"
383-500-397
383-500-398
1
Included
with boiler
Includes W-M sidewall vent/air termination cap and
inside/ outside cover plates and mounting hardware;
openings are sized for PVC pipe.
3" cap is shipped with Ultra-80–155.
4” cap is shipped with Ultra-230–399.
Sidewall DV with separate pipes or DE (elbow)
Inside and outside cover plates and mounting
hardware supplied with boiler can be used at wall
penetrations if size is the same as the pipe used. (Cut
plates to size for direct exhaust applications.)
Bird screens
3"
•
(
For 2” pipe, trim 3” bird screen to size
)
4"
383-500-105
383-500-110
1 DE
2 DV
Vertical DV with separate pipes or DE (coupling)
Bird screens
3”
•
(
For 2” pipe, trim 3” bird screen to size
)
4”
383-500-105
383-500-110
1 DE
2 DV
Coupling (1)
•
Add to the table at right
180-
•
degree return bend
(1) (DV only)
Add to the table at right
3" or 4” PVC concentric termination, sidewall or vertical
Standard C. T. kit, 3"
•
S636 compliant C. T. kit, 3”
•
S636 compliant C. T. kit, 4”
383-500-350
Consult factory
Consult factory
1
Reducers: 3”x2”
•
4”x3”
Add to the table at right
Fold out the opposite page to see venting details.
33
