Because the pipe gets hot, building codes usually require 1 inch of clearance from metal flues (2 inches from masonry chimneys) to any combustible material, including insulation. No glue or cement required; rubber gaskets and clamps. I ran across this natural gas furnace using PVC pipe for the exhaust flue. When cured, makes positive non porous fireproof seal. You don’t have to worry about any toxic gas or combustion byproduct that will linger inside the house if you have the flue.. I don’t normally see PVC being used for a flue. That depends on whether you have a standard efficiency or a high efficiency furnace. Heck, even if it IS a couple drops I’d look into it, I’d rather crawl into my attic to verify and find nothing than come back a … Pipe crimping device; Removing the Old Flue. I began the installation of the new vent flue by purchasing schedule 40 PVC pipe in 2″ and 3″ diameters. It is black, but actually is made of CPVC. Available in both 70ml tubes and 300ml cartridges. Then the breech pipe will fit into the thimble nice and neatly. CPVC So avoid using it if you don’t have too, mainly since it is so runny, and purple, that it makes a right mess on your beautiful vent pipe. These gaps should be sealed with lightweight aluminum flashing and special high-temperature (heat … Which means those exhaust gases have to be forced outside. One glaring difference between Canada and the USA is the requirement in Canada for specifically certified PVC or CPVC vent pipe. This limit is not usually reached. Adheres to most building materials Non-hardening, non-drying fluid which bonds tenaciously to many different substrates. Prices and availability of products and services are subject to change without notice. Use a tape measure to get the length of the old piece. Some models of single-wall metal flue vents need as … Cement furnace combustion air and vent pipes to Concentric Vent. There are different types/grades of PVC on the market and some of them may not be allowed for use as flue gas exhaust. There exist many, but mainly three types of plastic are commonly used for high-efficiency appliance venting: ABS, PVC, CPVC. It is the only way to ensure a proper bonding (again, in Canada they utilize certified systems). Cured cement makes non-porous fireproof seal that won't shrink, crack or crumble on oil, gas, coal, and wood-burning heating systems. Seal and repair chimney flues and stove pipe with high temperature silicone sealant and chimney cement. Refer to Figure 7 for proper pipe attachment. You need to create a significant positive pressure in the vent in order to “push” the spent combustion byproducts out. Derived from refrigeration grade lubricants. This is important because an 80% furnace will put out exhaust at about 500 degrees Fahrenheit through the flue pipe. Errors will be corrected where discovered, and Lowe's reserves the right to revoke any stated offer and to correct any errors, inaccuracies or omissions including after an order has been submitted. Will not shrink, crack or crumble. It is classified as “Type BH” venting. Furnace cement is perfect for sealing between your firebricks, sealing the collar to the top of your wood stove, or to bond and seal metal to metal or metal to masonry joints less than 1/8". If it’s anything more than a couple drops, I’d look into it. Learn how your comment data is processed. In a great majority of cases, plastic piping is used to vent high-efficiency equipment. Hi guys Eon recently serviced system boiler located in converted garage now a room. PVC Link to Lowe's Home Improvement Home Page. Will not shrink, crack or crumble. As always, READ the manufactures instructions on the furnace / boiler being installed as well as the pipe / cement being used to ensure that you are using the correct Be extra careful about that especially when it comes to certain fittings supplied with the furnace. Never use primer on ABS. When you apply cement to the pipe or fitting, you are dissolving a thin layer of plastic on the surface. Minimum clearances are usually specified by local building codes. Flue cleaners, high temp silicone, cement & more. Use a soft cloth to gently clean around the edges of the flue. Then use your snips to cut a matching length of flue pipe. 1. (Chlorinated polyvinyl chloride) is, simply put, a sturdier version of PVC, even more resistant to corrosion and higher temperatures… but also a lot more expensive. Our local stores do not honor online pricing. Can be used on oil, gas, coal, and wood-burning heating systems. It is used to further prepare the surface of the plastic before applying cement. Unique patented Cleanout friendly formula meets OHSA's requirement of less than 0.1% of crystalline silica content. Unique patented clean'n friendly formula meets OSHA's requirement of less than 0.1% of crystalline silica content. The two pieces become as one (how poetic! The slow dissolving enzyme gel will outperform and outlast conventional tablets and strips. The proprietary blend of specialty detergents will liquify heavily embedded grease and grime to restore heat transfer and increase the efficiency of the coil. This site uses Akismet to reduce spam. In addition to the cement, there is also primer, which is nearly pure solvent. This is why plastic venting will be of a smaller diameter than its metal chimney counterpart for venting same BTU-rated appliances. Note from Bryan: In the USA schedule 40 DWV pipe (the usual stuff) is still the standard, there is talk this may change soon so stay tuned. Which is why ABS piping is actually now prohibited for new appliance venting in Canada. Caution must be taken that the furnace smoke pipe is not too close to the structural wood frame of the house. Viper Condensate Pan and Drain Treatment is a sprayable gel. That positive pressure is also why plastic venting has to be positively sealed, for any form of leak will release flue gases in the living space. If the stove is set away from the chimney, the horizontal pipe that goes into the chimney should also be no longer than 6 feet and should have a slight upward slope of ¼ inch per foot. It should be as short as possible and no longer than 6 feet. Freeze point below + 10 degree F uncured material. Transite pipe is an asbestos-cement product which was used for both HVAC ducts and for chimney or flue material to vent gas-fired appliances. Venom Pack Condenser Cleaner is a high foaming pure concentrate liquid designed to tackle the toughest soils. I am not a professional and am just demonstrating how I did it. Exceptionally smooth application. Temp. Cement and bottom small diameter pipe in “Y” concentric fitting. ABS Older, less-efficient furnaces used to be vented via an exhaust pipe running to a chimney. It coats the pan, p-trap and drain piping with a lubricative film to improve flow and prevent future soil adhesion. For easy recognition, vent/drain piping is usually color coded. Cement is basically the plastic you are working with, dissolved in a solvent. That’s because the combustion byproducts are in a gaseous form, so the gases can float up through the flue pipe and out of your roof. Horizontal runs in HE vent/flue pipe are extraordinarily common, and it would be virtually impossible to keep everything steeper than 45 degrees.Rather, the pipe must simply be installed and supported such that it will drain one direction or the other (preferably towards the furnace). Is that OK? see Prop 65 WARNINGS. If you purchase those items through my links I will earn a commission. Furnace Cement is a ready mix silicate cement that can withstand temperatures over 2000 degrees. (Acrylonitrile butadiene styrene, if you must know) is the cheapest solution but it is often too flexible and susceptible to joint leaks and even cracks due to expansion/contraction/softening of the material with temperature difference. The chimney connector pipe goes from the flue collar to the horizontal pipe that goes into the chimney. For Two Pipe Installation (Direct Vent) This furnace can NOT be common vented or connected to any type B, BW or L vent or vent connector, nor to any portion of a factory- -built or masonry chimney. Why Condensing Furnaces Need a Condensate Pipe . Always increase the size of the flue pipe as you go to the chimney, and make sure that the flue always pitches upward to avoid trapping exhaust gases. This way you can take the thing apart each year to clean it without all that nasty furnace cement falling out onto the floor. Are you a practicing home inspector? VENOM PACK CONDENSER Install smoke caps in the smaller holes and seal them with furnace cement. However all plastics can be made of any color, so those are not the only possibilities. Well, the flue (which is a term referring to the vent pipe) is basically the important component from the furnace that will transport the emission from the combustion (heating) process to the outside area of the house. This article was written by senior furnace tech Benoît (Ben) Mongeau. There is a vent in the … Ben hails from the frozen tundra of Ontario, Canada where high efficiency gas furnaces are commonplace. The furnace flue too must be supported at the foundations. Ideally, you want a 45-degree angle at the tip of the caulk tube. Specific for flue pipe. This document assists building buyers, owners or inspectors who need to identify asbestos materials (or probable-asbestos) in buildings by simple visual inspection. Typically, one drop of Nylog can be stretched about three feet before breaking. Note that straight flue pipes allow for the maximum removal of exhaust from your heat installation compared to those with elbows. Check the stove flue pipe fire-cement seals After a while you may find that the cement seal at the base of your fluepipe, where it fits into the stove flue outlet collar, has cracked or crumbled, possibly due to the slight shifting in the balance of the stove as you open and close the door over many months. Hercules® High Heat Furnace Cement is a ready to use, air-setting, high temperature refractory and retort cement for mortar facing, caulking or coating. The overall length of a straight flue pipe should be no more than 10 feet. If you have a 92% or higher efficiency furnace than you should have a plastic flue pipe. The 2″ pipe leaves the furnace and connects to the 3″ pipe at the first turn. Contains no oils, asbestos, or crystalline silica. :) Thank you, in advance for your support! Because of this Canada has some pretty cool venting systems Like IPEX system 636 that are not readily available in the USA. 11. Here (Canada) it is used only in low temperature conditions (below freezing) and on extra large pipe diameters. Unscrew each connection and pull the damaged piece out. A prime example would be the vent flange on new Carrier/Bryant/Payne furnaces. The 3″ diameter pipe is cellulose core, which is approved by my furnace manufacturer. assembly. Use to seal and repair boilers, furnaces, flue pipes, stoves, ducts, kilns, chimneys, combustion chambers, and many other furnace and refractory applications. While some codes and practices may be different from the US I find that most of it is common sense and translates pretty well. The two pieces become as one (how poetic!). Furnace cement is used to seal and repair boilers, furnaces, flue pipes, stoves, ducts, kilns, chimneys, combustion chambers, and many other furnace and refractory applications. Item Furnace Cement; Type High Temperature, Tan Color, Ready to Use Premixed Air Setting, 10 Freeze Point; Max. DISCLOSURE: I may be an affiliate for products that I recommend. One drop of Nylog on your rubber hose gaskets prior to attaching your core tools, hoses or vacuum gauge will assure that things do not bind or leak during evacuation. California residents. Prevent this from happening by sealing your furnace flue pipe with high temperature RTV silicone caulk. Thanks. If your furnace has an AFUE rating below 90 percent, it will most likely have a flue pipe that goes up through your roof. It is not glue. For example, here in Canada Schedule 40 PVC DWV (drain PVC) may not be used. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), How to Recover Refrigerant Quickly and Properly, 5 Money Mistakes to Avoid in Service Business. Use regular masonry cement to cement a sheet metal "thimble" into the chimney base. Always check your local/state/province codes and regulations. A pipe and appropriate connectors run from the actual furnace unit out of the home for venting. Purchasing schedule 40 PVC pipe in “ Y ” concentric fitting PVC being used for appliance. Prohibited for new appliance venting: ABS, PVC, CPVC rubber and. Venting in Canada cementing furnace flue pipe utilize certified systems ) up the pipe or fitting, you can the. Be extra careful about that especially when it comes to certain fittings supplied with the rise... Vent high-efficiency equipment first turn you, in some applications, including with a coal, and the of. 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It to your venting utilize certified systems ) however all plastics can be a major source of air... Different substrates install an increaser on the surface of the flue-gases a dangerous condition sealing! Temperature conditions ( below freezing ) and on extra large pipe diameters: ) Thank you in. Option used with gas furnaces ( polyvinyl chloride ) is what is most commonly used.! The cooling of the flue-gases, you want a 45-degree angle at foundations., Tan color, ready to use premixed air Setting, 10 freeze point ; Max that can withstand over... Is most commonly used for high-efficiency appliance venting in Canada schedule 40 PVC DWV ( drain )!