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Read through all of these instructions before beginning your installation.
Failure to install as described in these instructions will void the manufacturer's
warranty and may have an effect on your homeowner's insurance and UL
listing status. Keep these instructions for future reference.
(1) National Fuel Gas Code, also referred to as NFPA 54 and ANSI Z223.1
(2) Simpson Dura-Vent's Sizing Handbook, available from Simpson Dura-
Vent
REFERENCES .......................................................................................... 1
GENERAL INFORMATION .................................................................. 1
............................................................................................... 2
Type B Gas Vents are for venting listed Natural Gas or Liquid Propane
Category I appliances only. The appliances listed below typically (but not always)
use Type B vent systems.
Simpson Dura-Vent Type B Vent Systems may be used on other gas-burning
appliances, provided the manufacturer of the appliance states in their installation
instructions that Type B-vent is acceptable.
MODEL DVR (ROUND) TYPE-B
GAS VENT INSTALLATION
INSTRUCTIONS
REFERENCES
................................................................................ 9
........................................................................... 10
ELBOWS...................................................................... 11
.................................................................................... 19
GENERAL INFORMATION
Boilers
Water Heaters
Room Heaters
Floor Furnaces
.................................................. 12
.................................................. 13
Furnaces
Unit Heaters
Duct Furnaces
Decorative Gas Appliances
Do not
1
........................................... 4
use Type B Vents for Category
MH6357
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Summary of Contents for DuraVent DVR
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Page 1: Table Of Contents
MODEL DVR (ROUND) TYPE-B GAS VENT INSTALLATION INSTRUCTIONS MH6357 Read through all of these instructions before beginning your installation. Failure to install as described in these instructions will void the manufacturer’s warranty and may have an effect on your homeowner’s insurance and UL listing status. -
Page 2: Planning
II, III, or IV gas appliances. Type B Vent shall not be used to vent flue products from incinerators, combination gas/oil appliances, oil-fired, or wood-burning appliances. If there is a question about the use of Type B Vents, contact the appliance manufacturer or Simpson Dura-Vent's Engineering Department for further information. - Page 3 Figures 1, 2, & show examples of some typical residential in- stallations. CEILING SUPPORT / FIRESTOP 4. Clearance to TOTAL VENT 90° ADJUSTABLE Combustibles. A 1-inch HEIGHT ELBOW B-VENT TEE clearance (air space) to B-VENT PIPE combustible materials must be maintained, WATER HEATER CONNECTOR RISE...
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Page 4: Steps For Typical Installation
is within 8 feet. Vent pipe with 14" or larger diameter must terminate at least 2 feet higher than an adjacent wall or obstruction, if it is within 10 feet. 8. Connector Rise. Plan a minimum of one foot vertical connector rise coming out of each appliance. - Page 5 Firestop Supports are Table 1 currently manufactured for PIPE SIZE STOCK NUMBER OF FRAMED INSIDE pipe sizes of 3" through 12" CEILING SUPPORT DIMENSIONS (X & Y) FIG 4 only. Larger sizes may be 3 INCH 1440 7-3/8" X 7-3/8" locally fabricated from sheet 4 INCH 1441...
- Page 6 HANGER CLAMP AND STRAPS HARDWARE HANGER STRAPS CEILNG SUPPORT Fig 7 NAILS CLAMP (4 REQ) Fig 6 8" diameter pipe. However, if desired, use 1/ 4-inch long sheet metal screws for 3" through 8" diameter pipe. Never penetrate the inner liner B-VENT with screws.
- Page 7 be used in many applications when a B-Vent connector is not required. 7. Elbows. When Elbows are re- quired, strap the Pipe Sections and/or Elbows in place using Wall Straps. Support the offset so that the weight of the offsetting pipe is not bearing down on the elbows, as shown in Figure 10.
- Page 8 clearance (air space) of 1 inch between the Pipe and construc- tion materials. Straight lengths of pipe are run up above the roof. (see table 2) A Roof Flash- 1 INCH MINIMUM ing is placed down over the CLEARANCE (ALL SIDES) pipe, and adjusted so it fits WALL STRAP FRAMED...
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Page 9: Bucket Support
pletes the installation steps. GAS VENT SYSTEMS USING VENT CAPS LISTED BY UNDERWRITER’S LABORATORIES MAY TERMINATE IN ACCORDANCE WITH THIS VENT Conduct a final inspection to TERMINATION TABLE ROOF PITCH MINIMUM HEIGHT insure that all joints are se- FEET METERS cure, the system is properly FLAT TO 7/12 supported, and is mechani-... -
Page 10: Combination Top
nail into place. Run the Pipe Sections through the hole in the Bucket Support, connect the Dura-Connect Single Wall Connector, and attach the Clamp so that it rests inside the Bucket, and will support the Pipe. Adjust the Pipe to the desired height and tighten the Clamp. -
Page 11: Adjustable Elbows
and seal with a non-hardening sealant, as shown in Figure 17. Seal all nail heads. 5. Height. Add sufficient Pipe Sections of B-Vent until the system terminates 1-1/2" to 3" above the collar of the Flashing as shown in Figure 6. -
Page 12: Male And Female Adaptors
does no longer have a 90° angle. 4. 45° Offsets with 90° Elbows. Figure 21 shows a 90° Adjustable Elbow being utilized to accomplish a 45° offset. This Elbow is completely MALE adjustable from 0° to 90°. Please note that the centers of the upper sections tend to displace by a slight amount, as FEMALE they are rotated. - Page 14 in your measurements. DRAFT HOOD CONNECTOR (b) Pipe and Fitting Requirements. The bottom 5 foot section of vent will be Flex Pipe (used to get around the Fig 27 smoke shelf, and to connect to the appliance). The remainder will be Fig 26 rigid B-Vent...
- Page 15 Fireplace. Push the gas fireplace towards the BASE OF GAS MASONRY RELINING ANCHORS firebox, and connect the Flex Pipe female cou- TERMINATION ASSEMBLY pling to the appliance, or to the appropriate TRIMMED AND SHAPED TO connector as specified by the appliance manu- FIT MASONRY AND FLUE TILE facturer.
- Page 16 large enough to reach through and hold the Tee, while connecting the horizontal Pipe Section. An alternate procedure is to make the hole only large enough for the Pipe Section to pass through, and construct an access gate on the other side of the masonry chimney.
- Page 17 through the access door while someone twist-locks the Pipe Section to it. Use an Adjustable Pipe Length as needed to obtain a specific location for the appliance. Make a mark on the horizontal Pipe Section flush with the vertical face of the masonry, for referencing the vertical position. Slip a Pipe Collar over the horizontal Pipe Section and install the remaining fittings as shown in Figure 30.
- Page 18 vent cap. 4. Blockage. Check the system for blockage by removing the cap, and looking down into the vent with a flashlight. Check for bird nests, debris, rodents, insects, or other obstructions. If nothing is found, inspect the entire system for physical damage. 5.
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Page 19: Maintenance
prevent rusting and corrosion on the exterior surfaces. MAINTENANCE 1. An annual inspection is required to maintain warranty of your Simpson Dura-Vent B-Vent system. You will need to inspect the Cap, Vent Pipe, Connector Pipe, and the connection to the appliance. 2. - Page 20 Simpson Dura-Vent offers the industry’s only twenty-five year warranty on Type B gas vent system and is UL listed. This warranty is in effect from the date of installation and includes all components and fittings. Simpson Dura-Vent warrants the following products: All Fuel Class A Chimney - Dura/Plus®...
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