Lennox ML193UHE Series Unit Information page 21

II-PLACEMENT AND INSTALLATION
Pipe & Fittings Specifications
All pipe, fittings, primer and solvent cement must conform
with American National Standard Institute and the Ameri-
can Society for Testing and Materials (ANSI/ASTM) stan-
dards. The solvent shall be free flowing and contain no
lumps, undissolved particles or any foreign matter that
adversely affects the joint strength or chemical resistance
of the cement. The cement shall show no gelation, strati-
fication, or separation that cannot be removed by stirring.
Refer to the TABLE 10 below for approved piping and fit-
ting materials.
TABLE 10
PIPING AND FITTINGS SPECIFICATIONS
Schedule 40 PVC (Pipe)
Schedule 40 PVC (Cellular Core Pipe)*
Schedule 40 PVC (Fittings)
Schedule 40 CPVC (Pipe)
Schedule 40 CPVC (Fittings)
SDR-21 PVC or SDR-26 PVC (Pipe)
SDR-21 CPVC or SDR-26 CPVC (Pipe)
Schedule 40 ABS Cellular Core DWV (Pipe)*
Schedule 40 ABS (Pipe)
Schedule 40 ABS (Fittings)
ABS-DWV (Drain Waste & Vent) (Pipe &
Fittings)
PVC-DWV (Drain Waste & Vent) Pipe &
Fittings)
PRIMER & SOLVENT CEMENT
PVC & CPVC Primer
PVC Solvent Cement
CPVC Solvent Cement
ABS Solvent Cement
PVC/CPVC/ABS All Purpose Cement For
Fittings & Pipe of the same material
ABS to PVC or CPVC Transition Solvent
Cement
CANADA PIPE & FITTING & SOLVENT
CEMENT
PVC & CPVC Pipe and Fittings
PVC & CPVC Solvent Cement
ABS to PVC or CPVC Transition Cement
POLYPROPYLENE VENTING SYSTEM
PolyPro® by Duravent
InnoFlue® by Centrotherm
UL 1738 CERTIFIED GAS VENTING SYSTEM
IPEX System1738 Schedule 40 PVC
Pipes and Fittings
IPEX System1738 PVC FGV Cement &
Primer
*
Not approved as of 12-1-2022
D1785
F891
Use PVC primer and solvent cement or ABS solvent ce-
D2466
ment meeting ASTM specifications, refer to TABLE 10.
F441
As an alternate, use all purpose cement, to bond ABS,
F438
PVC, or CPVC pipe when using fittings and pipe made of
D2241
the same materials. Use transition solvent cement when
bonding ABS to either
F442
F628 PVC or CPVC.
D1527
Low temperature solvent cement is recommended during
cooler weather. Metal or plastic strapping may be used for
D2468
vent pipe hangers. Uniformly apply a liberal coat of PVC
D2661
primer for PVC or use a clean dry cloth for ABS to clean
inside socket surface of fitting and male end of pipe to
D2665
depth of fitting socket.
ASTM
Canadian Applications Only - Pipe, fittings, primer and
SPECIFICATION
solvent cement used to vent (exhaust) this appliance must
F656
be certified to ULC S636 and supplied by a single manu-
facturer as part of an approved vent (exhaust) system. In
D2564
addition, the first three feet of vent pipe from the furnace
F493
flue collar must be accessible for inspection.
D2235
D2564, D2235, F493
D3188
MARKING
ULCS636
UL1738
Page 21
IMPORTANT
Exhaust and intake connections are made of PVC.
Use PVC primer and solvent cement when using
PVC vent pipe. When using ABS vent pipe, use
transitional solvent cement to make connections to
the PVC fittings in the unit.
CAUTION
Solvent cements for plastic pipe are flammable
liquids and should be kept away from all sources of
ignition. Do not use excessive amounts of solvent
cement when making joints. Good ventilation
should be maintained to reduce fire hazard and to
minimize breathing of solvent vapors. Avoid contact
of cement with skin and eyes.