Installation Methods for IPEX System 636® Type BH Class IIA (PVC) and Class IIB (CPVC) Gas Venting Systems A. Examine all components for possible shipping damage prior to installation. B. Proper joint construction is essential for a safe installation. Follow these instructions exactly as written. C. This venting system must be free to expand and contract. This venting system must be supported in accordance with these instructions. D. Check for proper joint construction when joining pipe to fittings. E.
Table of Contents Product Application .........................................................1 Limits of Use and Application............................................1 Termination Requirements .................................................3 Solvent Welding ............................................................11 Basic Principles ......................................................12 Priming .................................................................14 Set and Cure Times ...............
Introduction System 636® PVC and CPVC Type BH Gas Venting Systems are third party certified to ULC S636, latest edition. The following installation methods have been prepared in conformity with the requirements of section 4 of ULC Standard S636. 1. Product Application IPEX System 636 PVC and CPVC Gas Venting Systems are intended for positive and negative pressure venting of gas fired appliances producing exhaust gases having temperatures limited to the range specified in 1(a) and 1(b).
(d) Only certified System 636 PVC or CPVC primer and cement shall be used to assemble System 636 PVC or CPVC venting systems. * All IPEX System 636 cements contain special additives to aid in identification during warranty claims. NOTE: Follow IPEX solvent welding procedures as shown in this manual, and check for proper joint construction when joining pipe to fittings. (e) Venting should be as direct as possible with a minimum number of fittings.
3. Figure 1 Termination Requirements (positive pressure venting) (a) appliance manufacturer’s installation instructions, local building code requirements and CSA B149.1 Natural Gas and Propane Installation Code.
(g) A reducer may be used on the vent termination to increase the velocities of the exiting gases away from the intake (see Figures 1 & 3). Do not direct exhaust to window wells, alcoves or stairwells. (h) (i) Figure 3 Unconditioned space Reducer Coupling 8" MINIMUM Intake The exit points of gas venting pipe must not be less than 3 ft. from an opening into Outside wall another building.
(l) Follow appliance manufacturer's instructions regarding vent to appliance connections. Refer to ULC Standards Bulletin 2009-18. (Interpretation: Clause 4.7 F, ULC - S636-08, Standard for Type BH Gas Venting Systems). (m) 4. For concentric vent installations see Concentric Vent Termination Kit section. Chimney Installations IPEX considers it acceptable to install System 636 piping through an existing unused Figure 4 chimney space.
(f) Fresh air intakes may also be installed within existing unused chimney spaces providing acceptable spacing and clearance is obtained at the termination as per appliance manufacturer requirements. (g) Vertical piping through the chimney space or any other vertical spaces exceeding 20 ft (6m) is to be structurally supported by use of a pipe coupling installed immediately above and sitting upon a snugly fit pipe clamp.
5. Support and Restraint Spacing (a) System 636 PVC and CPVC systems must be supported horizontally at a maximum of every 5 ft (1.5 m). (b) Supports to be used on System 636 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 or hangers shall not have sharp edges or fulcrum points which might damage the System 636 pipe over time. (c) Changes in direction (e.g.
6. Expansion and Contraction To accommodate expansion/contraction movement and stresses that may occur, IPEX suggests the following guidelines during installation: 1. Leave adequate clearance between any System 636 elbows and walls or the underside of floor boards or joists. 2. Use loose fitting clamps and hangers to allow free pipe movement if required. 3.
TABLE 1 – PVC / CPVC Linear Expansion (ΔL) in inches Length of Run (ft) Temp. change 9 PVC CPVC (°F) 10 20 30 40 50 10 20 30 40 50 10 0.04 0.07 0.11 0.14 0.18 0.05 0.09 0.14 0.18 0.23 20 0.07 0.14 0.22 0.29 0.36 0.09 0.18 0.27 0.36 0.46 30 0.11 0.22 0.32 0.43 0.54 0.14 0.27 0.41 0.55 0.68 40 0.14 0.29 0.43 0.58 0.72 0.18 0.36 0.55 0.73 0.91 50 0.18 0.36 0.54 0.72 0.90 0.23 0.46 0.68 0.91 1.14 60 0.22 0.43 0.65 0.86 1.08 0.27 0.
TABLE 2 – PVC / CPVC Linear Expansion (ΔL) in mm Length of Run (m) Temp. Change PVC CPVC (°C) 3 6 9 12 15 3 6 9 12 15 5 0.8 1.6 2.4 3.2 4.1 1.0 2.0 3.1 4.1 5.1 10 1.6 3.2 4.9 6.5 8.1 2.0 4.1 6.1 8.2 10.2 15 2.4 4.9 7.3 9.7 12.2 3.1 6.1 9.2 12.2 15.3 20 3.2 6.5 9.7 13.0 16.2 4.1 8.0 12.2 16.3 20.4 25 4.1 8.1 12.2 16.2 20.3 5.1 10.2 15.3 20.4 25.5 30 4.9 9.7 14.6 19.4 24.3 6.1 12.2 18.4 24.5 30.6 35 5.7 11.3 17.0 22.7 28.
7. Firestops Should System 636 pass through a fire rated floor or wall, the penetration shall be firestopped with a device or system listed to CAN/ULC-S115 for an F and/or FT Rating equivalent to the hour rating of the floor or wall. 8. Appliance Testing Should the appliance not be equipped with an access port for flue gas testing, IPEX recommends the use of a System 636 Access Tee during installation to allow access for flue gas testing.
(d) For assembly of System 636 CPVC piping, only System 636 CPVC cement may be used. (e) Where primer is required (see Basic Principles of Solvent Welding), System 636 brand primer must be used (either purple or clear). (f) For transitions between PVC and CPVC, only System 636 CPVC cement shall be used. In instances where transitions to ABS are necessary, only System 636 Transition Cement shall be used. Note – some appliance manufacturers furnish adapter fittings which are PVC but black in color.
Surface Interaction in Solvent Weld Joint 3/32" (2.5mm) Approx Cement Coatings of Sufficient Thickness Surfaces must be assembled while they are wet and soft Bonded Surfaces Chamfer pipe ends 10-15° Fused Surfaces (Primer is always required for 6" and 8" piping systems and for all installations performed at temperatures of 0ºC or less.) Note: Some jurisdictions have mandated the use of primer regardless of temperature. Verify with your local Regulatory Authority. 1.
6. Check pipe and fittings for dry fit before welding. For proper interference fit, the pipe must go easily into the fitting 1/3 to 2/3 of the way. Should the dry fit be outside this range, do not proceed. Contact the System 636 supplier for further instruction. 7. Check for penetration and softening of the pipe’s surface. Take a scrap piece of System 636 pipe you will be using and make a normal application of the cement.
Solvent Welding 14. Stir the System 636 cement or shake can before using. Using the proper size applicator for the pipe size, 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 this will dry within a few seconds. 15. Aggressively work a medium layer of cement into the fitting socket; avoid puddling cement in the socket. 16. Apply a second full, even layer of cement on the pipe. 17.
Solvent Weld Set and Cure Times (PVC or CPVC) Set and Cure time for flue gas venting applications only. Average Initial Set Schedule ** Temperature Range ˚C (Celsius) ˚F (Fahrenheit) 15 to 40 5 to 15 –16 to 4 Average Joint Cure Schedule ** Joint Size Temperature Range Joint Size 1.5" to 2" 2.5" to 8" ˚C (Celsius) ˚F (Fahrenheit) 1.5" to 2" 2.5" to 8" 60 - 105 5 min 30 min 15 to 40 60 - 105 30 min 1.
Required Quantities of Solvent Cement Average Number of Joints/Qt. of IPEX System 636 Cement* Pipe Diameter (inches) Number of Joints 1-1/2 2 3 4 6 8 90 60 40 30 10 5 For the same number of joints where primer is used, one pint will be required for each quart of cement used. *These figures are estimates based on our laboratory tests. Due to the many variables in the field, these figures should be used as a general guide only.
Safety Precautions All solvent cements and primers for plastic pipe 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. Use in well ventilated area. If confined or partially enclosed, use forced ventilation or NIOSH-approved respirator. Avoid breathing vapors.
Use Caution with Welding Torches At construction sites where System 636 is being installed or has recently been solvent welded, extreme caution should be taken when using welding torches or other equipment where sparks may be involved. Flammable vapors from welded joints sometimes linger within or around a piping system for some time. Special care must be taken when using a welding torch around System 636 systems in industrial plant areas with little or no air circulation.
12. Handling and Storage of System 636 Pipe and Fittings (a) The PVC and CPVC materials used in System 636 piping are strong and lightweight materials. Care should be taken in handling and storage to prevent damage to the pipe. System 636 pipe should 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.
While in transit, pipe should be well secured and supported over the entire length and should never project unsecured from the back of a trailer. b) Prolonged Outdoor Exposure Prolonged exposure of System 636 pipe to the direct rays of the sun will not damage the pipe. However, some mild discoloration may take place in the form of a milky film on the exposed surfaces. This change in color merely indicates that there has been a harmless chemical transformation at the surface of the pipe.
13. System 636 Statement of the Bases for Acceptance The acceptance of any appliance using IPEX System 636 PVC or CPVC Gas Venting Systems is strictly predicated on the following conditions: Condition No. 1 Only System 636 PVC or CPVC components supplied for the job have been used in the installation, with no unauthorized substitutions. Condition No. 2 The system has been installed in accordance with CSA B149 Gas and Propane Installation Code. Condition No.
14. Maintenance IPEX recommends that the System 636 gas venting system be checked once per year by a qualified System 636 service technician during any regular maintenance activities as required for the heating appliance. 15. Training WARNING The following is an excerpt from CSA B149.1-15 for Natural Gas and Propane Installation Code: 4.4.2: Personnel performing installation, operation, and maintenance work shall be properly trained in such functions.
16. Accessory Installation Instructions Access Tee 1. The Access Tee shall be installed in such a manner as to prevent the collection of condensate, preferably on a vertical run of pipe. 2. PVC Access Tees shall only be used on PVC venting systems. CPVC access tees shall only be used on CPVC venting systems. 3. Solvent cement the access tee into the piping system. Allow for the proper set and cure times before proceeding to next step. 4.
Low Profile Side Wall Termination Kit Termination kits must be tested and certified for use with whatever brand of heating appliance TABLE 3 – Low Profile Termination Kits Dimensions and pipe-fitting-cement system is used. IPEX termination kits such as the Low Profile are fully Item # Description Pipe O.D. Hole Spacing (ctr to ctr) certified for use with IPEX product only. 196984 2" Flush Mount Vent Kit 2.375" 5.6" System 636 PVC Low Profile vent kits are made 196985 3" Flush Mount Vent Kit 3.
3. To fasten the Base to the wall, use the supplied screws and anchors. A Figure 5 3/16" (5mm) diameter, 1-3/16" (30mm) deep, will need to be drilled To appliance intake air connection for the anchors. Locate the anchor hole using the base as a template. From appliance vent pipe connection 4. Screw the Cap to the Base using the supplied screws. 5.
Figure 7 6. When locating the penetration of the vent and air pipes, ensure the termination is properly oriented as shown in Figure 6. For multiple vent Air Piping terminations ensure that a minimum clearance of 12 inches be Vent Base maintained between edge of air inlet and adjacent vent outlet and that all vent pipes and air inlets terminate at the same height to avoid Vent Cap Vent Piping possibility of severe personal injury, death, or substantial property damage. (see Figure 8) 7.
Table 5 Concentric Vent Termination Kit System 636 Pipe, Fittings, Termination Kits and Cements are certified as a system and must be installed as such. Different manufacturers have different materials, joining systems and adhesives. Do NOT mix pipe, fittings, cements, or joining methods from different BH Vent manufacturers, this can result in unsafe conditions and will void the certification. System 636 PVC/CPVC concentric vent kits are made from certified compounds.
Concentric Vent Kit Assembly 1. Once the proper location has been determined, cut a hole in the roof or wall large enough to accommodate the outer pipe. The size of the hole can vary greatly depending on the roof pitch. 2. As per the procedures outlined in the System 636 Installation Guide, solvent weld the inner pipe to the concentric wye fitting. 3. Solvent weld the outer pipe to the concentric wye fitting. 4. Slide the assembly through the roof or wall penetration. (Install flashing if needed).
Installation / Support Procedures 1. Kits must be securely fastened to structure, to ensure dimensions shown on Table 5 and Figure 9 are maintained. 2. Figure 10: Wall Termination Straps are field supplied. Use straps, clamps or equivalent that will not score or damage the Exhaust Exhaust Air Intake Air Intake Exterior wall pipe. Expansion and contraction should be addressed between appliance and termination point. 3. All penetrations must be sealed according to local building codes.
Typical Concentric Vent Kit Spacing For multiple horizontal installations, keep Concentric Vent Kit gaps close (up to 4" apart) or over 24" apart. Figure 12: Typical CVK Spacing Sidewall Termination for Multiple Horizontal Concentric Vent These guidelines are not appliance specific; OEM manufacturers may supply spacing dimension specific to each appliance. In this case the manufacturer’s recommendations shall supersede those described herein.
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 9). 1. Locate the drill location dimple on the outside of the rain cap. (drill location reference 5 in Figure 9) 2. At this location, drill through the cap and the inner pipe wall. Ensure that the path of the hole is perpendicular to Figure 9 5 A G B D E F the inner pipe NOT the outside of the cap.
System 636 Pipe, Fittings and Cements are certified as a system and must be installed as such. Different manufacturers have different materials, joining systems and adhesives. Do NOT mix pipe, fittings, solvents, or joining methods from different BH Vent manufacturers, as this can result in unsafe conditions. These recommendations were issued in February 2018 and supercedes manual dated November 2016. These recommendations are subject to periodic review and updates may occur without notice. IPEX Inc.
