Install Instructions

ManualsBrandsWeil-McLain ManualsBoilersEVG 70 - 57,000 BTU Output Evergreen High Efficiency Condensing Gas Boiler (NG or LP)

Venting & air — general (continued)

Figure 23 Vent and air piping materials — Use only the materials listed below, ensuring that all materials meet

local codes (see Figure 110, page 127 for part/kit numbers)

ALL vent and air pipes require a BIRD SCREEN at each termination. Most kits do not include

the bird screens. Purchase bird screens separately from Weil-McLain or vent kit supplier if

not included. [Note — bird screening is integral to the 3" PVC Weil-McLain sidewall vent

cap,

available for purchase from Weil-McLain

. No additional screening is required.]

USE SWEEP ELBOWS FOR ALL VENT AND AIR PIPING — DO NOT use short

radius elbows for vent or air piping. Boiler performance could be a ected.

Part number 550-100-191/0917

gas-fired water boiler — 70/110/155 Boiler Manual

Item Material

Standards for installations in:

United States Canada

(Note 2)

Plastic piping materials Vent or air piping

Vent

piping

Air

piping

Vent or air pipe

ﬁ ttings

PVC schedule 40 ANSI/ASTM D1785 ULC S636

PVC, PVC-DWV,

CPVC or

polypropylene

PVC-DWV schedule 40 (Note 1) ANSI/ASTM D2665 NA

CPVC schedule 40 (Note 1) ANSI/ASTM F441 ULC S636

PVC & ABS pipe

cement & primer

PVC ANSI/ASTM D2564/F656 ULC S636

Use only cement

and primer

suitable for piping

material used

CPVC (Note 1) ANSI/ASTM F493 ULC S636

Polypropylene

vent pipe, ﬁ ttings,

terminations and

cement

Simpson-Duravent — Obtain all materials from M&G

Simpson-Duravent

Centrotherm Eco Systems InnoFlue

Single-wall —

Obtain all materials from Centrotherm

Note: See page 127 for correct appliance adapters to be used.

See manufacturer’s literature for

detailed information

MUST USE LOCKING

COLLAR ON EVERY JOINT

ULC S636

PVC, PVC-DWV,

CPVC or

polypropylene

AL29-4C stainless steel piping materials

Vent pipe

AL29-4C

stainless

steel

Heat Fab, Inc. — Saf-T-Vent

Z-Flex, Inc. — Z-Vent II

Dura-Vent — FasNSeal™

Metal-Fab, Inc. — CORR/GUARD

Centrotherm Eco Systems — InnoFlue

Certiﬁ ed for Category IV and

direct vent appliance venting

Certiﬁ ed for Category IV and direct

vent appliance venting

Weil-McLain stainless steel bird screens, 2" or 3" (purchase separately) — see Figure 110, page 127 for part numbers

Note 1: Weil-McLain concentric vent kits are made from PVC pipe

and  ttings.

Note 2: System 636 PVC concentric terminations utilize PVC

pipe/ ttings certi ed to ULC S636.

If ULC S636 compliance is required, use only System 636

pipe,  ttings and cement.

DO NOT mix piping from di erent pipe manufacturers

unless using adapters speci cally designed for the purpose

by the manufacturer.

Every joint on polypropylene vent piping must include

a locking collar.

DO NOT use cellular core PVC (ASTM F891), cellular core

CPVC, or Radel

(polyphenolsulfone) in venting systems.

DO NOT cover non-metallic vent pipe and  ttings with

thermal insulation.

ADAPTERS — AL29-4C piping — Install a PVC-to-stainless

adapter supplied by the AL29-4C stainless pipe

manufacturer at the 3" PVC boiler vent connection

and at the termination (if using Weil-McLain plate or

concentric PVC termination).

ADAPTERS — Polypropylene piping — Provide adapters

from polypropylene pipe to the 3" PVC connections at

the boiler and at terminations, if required (Weil-McLain

sidewall plate, for example).

ADAPTERS — If using 2" piping, where approved for

the application, provide adapters for the 3" PVC boiler

connections and at the terminations, if required (Weil-

McLain sidewall plate, for example)