Fulton Heating Solutions, Inc. -- PHW Manual -- 2010-0713
Page 46
26. Wall Thimble Installation
a) A 9" diameter thimble is inserted through the wall from the outside. Secure the outside
flange to the wall with nails or screws, and seal with adhesive material. Install the inside
flange to the inside wall, secure with nails or screws, and seal with adhesive material.
Pass the vent pipe through the thimble from the outside and join to the rest of the vent
system. Seal the pipe to the thimble flange with adhesive material. Figure 14. Install two
pipe retaining clamps around the intake as well as vent pipes on both ends of the wall
thimble (on the inside and outside of the wall) through which intake and vent pipes are
passed, then tighten securely. They will prevent the intake and vent pipes from being
pushed or pulled.
b) Insure wall thimble for exhaust vent contains internal insulation prior to installation.
27. Horizontal Vent Termination
a) The vent termination is joined to the vent pipe outside the wall. Use the same joining
procedures for vent pipe and fittings. The termination of the vent system must be at least
12" above the finished grade, or at least 12" above normal snow accumulation level (for
applicable geographical areas). Refer back to Figure 13. The termination of the vent
system shall not be located in traffic areas such as walkways, adjacent buildings,
openable windows and building openings unless the venting system is at least 7 feet
above finished grade, (National Fuel Gas Code, ANSI Z223.1). The vent termination must
be at least 4 feet (1.22m) horizontally from, and in no case above or below, unless a 4-
foot (1.22m) horizontal distance is maintained from electric meters, gas meters,
regulators, and relief equipment.
Figure 14
To Next Page
Loading...
