® Installation Methods Guide for IPEX System 1738® Venting Systems for Gas-Burning Appliances Categories II and IV A. Examine all components for possible shipping damage prior to installation. B. Proper joint assembly is essential for a safe installation. Follow these instructions exactly as written. Check the integrity of joints, to be leak proof upon completion of assembly. C. This venting system must be free to expand and contract.
® NOTES ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ___________
® Table of Contents System 1738® Safety Alerts................................................1 Solvent Welding .............................................................13 Supplemental Information – DO’S and DON’TS.. 2 Safety Precautions.......................................................... 13 Product Application..............................................................3 Limits of Use and Application........................................3 Solvent Welding Basics...........................
® IT IS IMPORTANT TO READ AND UNDERSTAND THIS GUIDE. IT CONTAINS INFORMATION TO HELP MAINTAIN SAFETY AND PREVENT PROBLEMS. Improper installation or use of System 1738® can result in personal injury and/or property damage. It is important to be aware of and recognize safety alert messages as they appear in this manual. The types of safety alert messages are described below. This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
® System 1738 Safety Alerts WARNING NEVER use or test System 1738 with compressed air or other compressed gases. Use of compressed air or gas in System 1738 pipe and fittings can result in explosive failures and cause severe injury or death. WARNING Follow all preparation and installation procedures. NOTICE Use only System 1738 in flue gas venting applications for category II and IV appliances generating a max flue temp of 149oF (65oC). WARNING Carbon monoxide (CO) can cause brain damage or death.
® Supplemental information – DO’S and DON’TS CAUTION Refer to the contents of this guide for complete instructions and guidelines.
® System 1738® PVC Categories II and IV Gas Venting System is third party certified to UL 1738, latest edition. The following installation methods have been prepared in conformity with the requirements of section 47 of UL Standard 1738.
® Termination Requirements (d) THE FOLLOWING RECOMMENDATIONS ARE NOT TO SUPERSEDE LOCAL BUILDING CODE REQUIREMENTS. (a) Installation and location of terminations must be in accordance with the latest edition of appliance manufacturer’s installation instructions, local building code requirements and NFPA 54 / ANSI Z223.1 National Fuel Gas Code. (b) Intake and vent pipes may be routed either horizontally through an outside wall (see Figure 1) or vertically though the roof (see Figure 2).
® Side Wall Terminations Snorkel termination: (a) The runs of intake and vent pipes for terminations in general should be installed as close together as possible. A sidewall penetration shall maintain a 6" maximum separation (see Figure 3) (e) A reducer may be used on the vent termination to increase the velocities of the exiting gases away from the intake (see Figures 3 & 4). Do not direct exhaust to window wells, alcoves or stairwells.
® Low Profile and Concentric Termination: (a) The use of the low profile or concentric vent termination kit must be specified for use as a termination option in the appliance manufacturer’s installation manual. Low Profile Termination (a) Ensure the termination is properly oriented as shown in Figure 5. (e) Reference the Low Profile Side Wall and Concentric Vent Termination Kit section of this guide for full installation instructions of these termination options.
® Pitched Roof Terminations Snorkel and concentric termination: (a) In accordance with the requirements of the 2018 edition of the NFPA 54/ANSI Z223.1 National Fuel Gas Code, gas vents that are 12 inches or less in size and located not less than 8 ft from a vertical wall or similar obstruction shall terminate above the roof in accordance with Figure 9 and Table 1. (d) The run of intake and vent pipes for a snorkel termination in general should be installed as close together as possible.
® Flat Roof Terminations (i) Snorkel termination: On flat roof installations the air intake and the exhaust vent terminations must be a minimum of 24 inches above any parapet, vertical wall or structure within 10 feet horizontally. (see Figure 10) (ii) Concentric Vent Kit termination: When installing a concentric termination vertically through a flat roof, the termination’s vent cap must be a minimum of 10 feet away from any parapet, vertical wall or structure.
® Chimney Terminations If System 1738 piping is installed through an existing unused chimney space, installers shall adhere to the following guidelines when doing such installations: (a) Vent pipe sizing to be as per appliance manufacturers’ instructions or appliance manufacturer’s technical manual. (b) NO existing non-certified vent piping shall be used or re-used for venting. They shall all be replaced with System 1738 as required.
® Support and Restraint Spacing (a) System 1738 PVC systems must be supported horizontally at a maximum of every 5 feet. (b) Supports to be used on System 1738 pipe shall be suitable for use on plastic pipe and shall not be tightly clamped onto the pipe to allow for possible expansion/contraction movement. Pipe clamps, hangers, metal strapping or equivalent shall not have sharp edges or fulcrum points which might damage the System 1738 pipe over time.
® Expansion and Contraction Firestops To accommodate expansion/contraction movement and stresses that may occur, IPEX suggests the following guidelines during installation: Should System 1738 pass through a fire rated floor or wall, the penetration shall be firestopped with a device or system that provides a rating equivalent to the hour rating of the floor or wall. 1. Leave adequate clearance between any System 1738 elbows and walls or the underside of floor boards or joists. 2.
® Handling and Storage of System 1738 Pipe and Fittings a) The PVC materials used in System 1738 piping are strong and lightweight materials. Care shall be taken in handling and storage to prevent damage to the pipe. System 1738 pipe shall be given adequate support at all times. It should not be stacked in large piles, especially in warm temperature conditions, as bottom pipe may become distorted and joining will become difficult.
® Solvent Welding WARNING DANGER: Highly flammable liquid and vapor may form explosive peroxide. Carefully follow guidelines below. Safety Precautions Solvent cements and primers for System 1738 pipe and fittings are flammable and shall not be used or stored near heat, spark, open flames and other sources of ignition. Vapors may ignite explosively. Keep containers closed when not in use and covered as much as possible when in use. First Aid Inhalation: Use in well ventilated area.
® Solvent Welding Basics WARNING Installation of System 1738 for the application of flue gas venting requires a certain degree of skill to avoid joint failures which could be life threatening. Creating optimal solvent welded connections requires attention to detail, proper preparation of components and an understanding of all instructions in this guide. On-site training is available from IPEX for proper solvent welding procedures as well as other important installation points. Contact IPEX for details.
® System 1738 Solvent Weld Appliance Service Time WARNING During the curing of the solvent welded joints, vapors may accumulate inside the piping system, especially should one end of the line be capped. Nearby sparks from welders or torches may inadvertently ignite these vapors and create a hazardous incident. Attention must be given to removing all vapors using air-blowers or water flushing prior to capping one end of an empty piping system.
® Cold Weather Solvent Welding – Below 50°F (10°C) 1. Prefabricate as much of the system as possible in a heated area 2. Store System 1738 primer and solvent cement in a warm location above 40oF (4oC) when not in use and make certain cement remains fluid 3. Take special care to remove moisture including snow and ice from the surfaces being joined including pipe ends and fitting sockets 4. Ensure that the pipe, fittings and accessories are at the same temperature prior to solvent welding 5.
® Solvent Welding Preparation Guidelines 1) ASSEMBLE 3) CUTTING THE PIPE Before beginning, assemble proper materials for the job: (System 1738 cement and primer (if required), appropriate applicator for the size of pipe and fittings to be assembled, tape measure, contrasting color marker and Reed DEB4 beveling tool). It is important to cut the pipe squarely. A square cut provides the surface of the pipe with the maximum bonding area.
® 5) CLEANING Using a clean dry cloth, wipe any dirt and moisture from the fitting socket and the pipe end. Moisture will increase cure times and dirt and grease can prevent adhesion. 6) DRY FITTING Before applying primer or solvent cement, test all connections (pipe, fittings and accessories) to confirm a proper interference fit exists. Dry-fit contact between properly beveled pipe and fitting sockets is essential in making a good joint.
® Solvent Welding Guidelines 12) Vigorously shake the System 1738 cement can before using. If the cement is jelled, replace with a new can. 13) Using the proper size applicator for the pipe size as outlined in #7, aggressively work a full even layer of cement on to the pipe end equal to the depth of the fitting socket - do not brush it out to a thin paint type layer, as it will dry too quickly. 14) Aggressively work a medium layer of cement into the fitting socket.
® System Repair Maintenance Inspect pipe for any damage such as cracking and deep gouges. Locate the end of any pipe cracks and be sure to cut at least 2” beyond the crack line to ensure it is removed. IPEX recommends that the System 1738 Flue Gas Venting system be checked at least once per year by a licensed Plumbing or HVAC service technician. This can be done during any regular maintenance activities as required for the heating appliance or any other time.
® Accessory Installation Instructions Access Tee Low Profile Side Wall Termination Kit 1. The access tee shall be installed on a vertical run of pipe to prevent the collection of condensate. 2. PVC Access Tees shall only be used on System 1738 PVC venting systems. Do not mix pipe, fittings, cements, or joining methods from different Vent manufacturers. This can result in unsafe conditions and will void the certification and warranty.
® 3. Once the installer has determined the termination location, cut 2 holes in the wall large enough to accommodate the pipe. Pipe diameters and distance between hole centers can be found in Table 4. 5. To fasten the Base to the wall, use the supplied screws and anchors. A 3/16" diameter x 1-3/16" deep hole, will need to be drilled for the anchors. Locate and mark the anchor hole using the Base as a template and then drill the required holes. 4. Slide both the intake and vent pipe through the holes.
® Concentric Vent Termination Kit Figure 17 G B D Do NOT mix pipe, fittings, cements, or joining methods from different manufacturers, this can result in unsafe conditions and will void the certification and the product warranty. E F 45º 3 C 1 System 1738 Pipe, Fittings, Termination Kits and Cements are certified as a system and must be installed as such.
® Install Considerations Figure 18 WARNING 1 Do NOT mix pipe, fittings, cements, or joining methods from different manufacturers, this can result in unsafe conditions and will void the certification and the product warranty. 3 E B D 2 4 C FG A System 1738 Pipe, Fittings, Termination Kits and Cements are certified as a system and must be installed as such.
® Universal Concentric Vent Kit (UCVKTM) Assembly 1. Ensure that the Universal Concentric Vent Kit is configured to fit your venting system by following the instructions outlined with the Configuration guide. 2. Once the installer has determined the termination location, cut a hole in the roof or wall 1/2" larger than the “C” dimension referenced in Table 6 for the part being installed. 3.
® Universal Concentric Vent Kit Configuration Guide 1) The Universal Concentric Vent Kit comes assembled in the box for a venting system with a left hand side configuration (Figure 1). If your system is set up as a left hand configuration skip to step 7.
® Concentric Vent Kit Assembly 1. Once the installer has determined the termination location, cut a hole in the roof or wall 1/2" larger than the “C” dimension referenced in Table 5 for the part being installed. The size of the hole can vary greatly depending on the roof pitch. 2. As per the procedures outlined in this guide, solvent weld the inner pipe to the concentric wye fitting. 3. Solvent weld the outer pipe to the concentric wye fitting. 4.
® Figure 20: Typical Concentric Vent Pitched Roof Termination Figure 21: Typical Concentric Vent Flat Roof Termination Exhaust Distance above avg.
® Mechanically Fastened Rain Cap The Rain Cap must be installed with the supplied Stainless Steel bolt and lock nut, and in accordance with the following instructions and diagram (Figure 24). 1. Locate the drill location dimple on the outside of the rain cap. (drill location reference 5 in Figure 24) 2. At this location, drill through the cap and the inner pipe wall. Ensure that the path of the hole is perpendicular to the inner pipe NOT the outside of the cap.
® NOTES ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ___________
® NOTES ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ___________
System 1738® Pipe, Fittings and Cements are certified as a system and must be installed as such. Do NOT use or mix with other IPEX products other than those specified in this guide. Different manufacturers have different materials, joining systems and adhesives. Do NOT mix pipe, fittings, or joining methods from different manufacturers, this can result in unsafe conditions. These recommendations were issued on December 17, 2018, and are subject to periodic review. IPEX Inc. 1425 North Service Rd. E.
