Step 5 - Attach the Pipes. Boiler flues are a pipe or duct, often found protruding from an outside wall or roof that are attached to gas boilers. The pipes begin at the stove and end at the chimney pipe, which channels into the chimney directly where it exhausts the fumes. Ensure you are getting an even, consistent bead of … How to Seal Gap Around Water Heater Vent Pipe. For example, if the flue collar is on the back of the appliance, you may need elbow joints if you are connecting to a chimney on the roof. If its a condensing boiler make sure it has a slighty rise to outside, if its a standard non condensing boiler its best to be level or have a slight fall. It’s an essential unit that helps expel exhaust gases and byproducts of combustion into the outside atmosphere, keeping your home safe and pollution-free. Sealing the flue is essential in preventing gasses from escaping back into your home. What is a boiler flue? This might include sealing: Where the flue pipe it fitted to the stove. Any parts of the corroded flue need to be replaced. There are few options that will allow you to easily seal off your flue: a silicone rubber seal or inflatable sealer. The flue pipe is open at the bottom to the atmosphere at the bottom. These gases are then safely expelled outside the building. Flues can either exit the property straight out the external wall behind the boiler with a horizontal flue, or if the boiler is not located on an external wall then a vertical flue can be used to exit the property through the roof. Squeeze the trigger with firm, even pressure as you move the tip around the seam on the furnace flue. Engage the twin flue duct adaptor in the boiler adaptor, making sure that … Kamino-Flam Flue Pipe Gasket, Calcium-Magnesium-Silicate Thermal Insulation Sheet for Pipes with Ø 120 - 150 mm, Seal for Stove Flue Pipe Door, Heat Resistant up … Admittidly the joint was screwed but still it wasn't a pretty site. Gaps around the hearth. The sealant can be used anywhere where you need to seal a gap or joint in your stove system. Furnace Flues Require Special Sealing Techniques. The boiler needs to be stripped down, and burners and jets need to be cleaned and thoroughly serviced. If you’re not sure if your fireplace is safe to use, it’s probably time for an inspection. The flue is essentially the pipe that transports these gases out of the boiler. You can simply solve this problem by pouring warm water onto the pipe. The boiler condensate pipe is blocked. any suitable seal that meets the fire rating of the wall and the manufacturers instructions should be fine. Want to upgrade your fireplace? For you, that might mean a future of costly repairs. Energy Star also suggests specific material for flues, vents, and pipes on varying heating equipment: You can install a chimney flue channel yourself if you’re equipped with a basic background in home improvement. The flue is created out of metal sheets. Due to the current national lockdown, our trade counter and showroom are closed to the public, but we remain open for online ordering and click and collect orders. Seal and repair chimney flues and stove pipe with high temperature silicone sealant and chimney cement. When dealing with carbon monoxide and combustion byproducts, you can never be too cautious. leaking isolation valve on Worcester Boiler, Elgar Services: Name of Excellence in Plumbing Services. As far as i know expanding foam around a flue is an AR. You’ll lay these sheets out, rolling them so they’ll fit inside the chimney while placing screws along their edges to secure them in place. The pipes immediately underneath your boiler are going to be your number one culprit for the leaking boiler. Whatever we find, we can fix. Just make sure you’ve closed all of the gaps because no matter what kind of pipe you’re working with, its purpose is to properly expel dangerous gasses out of your home. Sand a cement is the best option really, easy to mess with in the future also when you have a new boiler. This can mean bad news for your home like an unwanted draft, higher energy bills, and not to mention an unsealed flue pipe can expose the interior of your chimney to potential water damage. Here, you’ll be sealing off the flue’s mouth from your home to prevent drafts when the fireplace isn’t in use. Traditional fireplace dampers leak, so sealing your fireplace flue is smart when you aren’t using it like during the off-season. It’s generally preferred for easier access, and it’s also easier to seal the area and make it water tight. By Norman Becker, P.E. Boiler flues are essential for dealing with exhaust fumes safely and they also help protect boilers, keeping them functioning efficiently for longer. This action is different than sealing the flue itself, which runs the length of the chimney. When having a new boiler installed, the cost of the flue won’t be something you have to be too concerned about. Over time, the flue may experience gaps from regular wear and tear, requiring a fresh layer of sealant. Flues: available in different shapes and sizes . The seals used are mostly EPDM materials. also patch it up with the boiler turned off. This is not a nugget of information many of us store at the forefront of our minds, so don’t panic if you don’t know off the top of your head. Looking for a Heating Engineer? Learn more our maintenance process here. A flue pipe can be located at your fireplace, your furnace, or even your water heater. Or it could be time for a boiler change. Plumbing: should have piping comprised of cast iron or PVC and be sealed with expanding foam or caulking depending on the gap. This is because it will be included in the cost of the boiler. I am installing the flue pipe for the new furnace I installed for my dad. Twin Pipe Flue System (80/80) The kit allows connection of a twin flue system to the boiler adaptor. How to Seal a Chimney Pipe. You’ve come to the right place. One end of the chimney pipe will be crimped and this is where you’ll slide the stove pipe over, pressing them together firmly. I once saw a flue sealed with expanding foam and the foam warped and disturbed the flue joint. You’ll then insert the flue liner, lowering it down inside of the flue itself. Find out more about our repair process here. Next, you’ll just need to drill through the sheet metal with the right drill bit, placing a self-tapping screw against the stove pipe’s overlap to secure it. The Solution. If you’re thinking about replacing your boiler, and you’re having a chat with an engineer over the phone, they might ask you what kind of flue you have.. if the gaps quite big then use some fibreglass out ya loft to pack it out alittle first. Under the boiler flue position regulations, the flue has to be positioned a certain distance from any parts of the home that can be opened up such as windows and doors. Sealing the flue pipe is a part of the installation process. Boiler Flues from Wosleley. About halfway between the chimney connection and the floor the flue pipe "T"s. At the "T" the flue pipe runs horizontal over to a residential boiler … Furnaces and water heaters: should have pipes made of galvanized metal and sealed with aluminum flashing and high-temperature silicon caulking. - Checkout our specific plumbing forum for you:USA Plumbing Forum, Discuss sealing around flue in the Central Heating Forum area at PlumbersForums.net, Reply to sealing around flue in the Central Heating Forum area at PlumbersForums.net, Welcome to PlumbersForums.net - The international free. Seal Your Flue Pipes: Homeowners Clinic. However, that doesn’t mean there aren’t some things you should be aware of. I was looking to close up the small gap where the exhaust pipe goes into the chimney, because the gas and electric company said carbon monoxide was detected around the opening. If its a condensing boiler make sure it has a slighty rise to outside, if its a standard non condensing boiler its best to be level or have a slight fall. You might find that if you have a wood or gas burning stove, you might need to seal the stove pipe to the chimney pipe. Carefull using too much foam cos it will spew everywhere when it expands. Multifit Flue Group G Horizontal flue inc. boiler and terminal adaptors COLOUR Black DIAMETER 80/125mm SALES CODE 5118580 1m flue extension White SPECIFICATION 1000mm 5118584 Flue bend COLOUR White 91.5º DIAMETER 80/125mm SALES CODE 5118588 Pipe support bracket SPECIFICATION 125mm flue pipes 125mm 5118610 Flue bend (pair) When the elbow pipe attached to the flue has hardened and the pipe assembly connections have dried, you may then attach the pipes together. Proper maintenance begins with good old fashioned hygiene. I have a flue pipe extends from the chimney entrance to within 6 inches of the floor. We stock a huge range of pipe flashings and roof flashings from Dektite and V-Seal. I wouldn't use expanding foam. if you do use exp foam get the pink fire rated stuff. There’s an easy way to seal each of these and it doesn’t necessarily require special skills. The position of the flue collar affects the design of your venting system. All properties on the market will benefit by having flue pipes or stove pipes, from wood- or gas-burning stoves, looking good and sealed tight. However, in some situations an FKM or silicone seal is used. This is a simple task that begins with you lining up the stove pipe with the chimney pipe. By definition, a boiler flue is a duct or pipe for the expulsion of exhaust gases from a heating system or generator. ... Find out in our report of the worst boilers. Getting mixed answers about this. Remember to seal all the joints. JavaScript is disabled. That pesky draft you’ve been noticing could be coming from your chimney. From the United States of America? In many boilers, a connecting piece or adapter is used to connect the air supply and flue pipe to the boiler. The flue is then sealed with a band that should be included in your kit. If you do find a leak, the causes could vary. Where roof flashing meets the flue pipe. Per Energy Star, building codes typically require that there is a 1-inch clearance from metal flues, as these flue pipes become incredibly hot, from any combustible material like insulation. To use, it ’ s generally preferred for easier access, and burners and jets need to replaced. Stock a huge range of diameters the expulsion of exhaust gases away from boilers or other heating systems end. Pipe was removed, my builders have left the external hole exposed and not blocked this up the! Exhaust gases away from boilers or other heating systems on the furnace or water.... Are efficient at sealing off the flue itself foam quicker, easier and less.... Next service away from boilers or other heating systems been noticing could be time for an inspection installed. Few options that will allow you to easily seal off your flue: a silicone rubber or... Fire rating of the chimney even, consistent bead of … getting mixed answers about this expelled outside building... Use, it ’ s also easier to seal each of these and it ’ s a buildup of in. Silicone sealant and chimney cement flue is an AR hole exposed and not blocked this up on the Gap exhaust. Boiler are going to be replaced the old flue pipe was removed, my builders left. Should have a fire guard plate and sealed with expanding foam around a pipe. Or both take it theres no issue or gas burning stoves also have pipes, and flue pipe be. Layer of sealant, my builders have left the external hole exposed and not this... Restricting use of foam as dont want eon moaning at next service building! A leak, so sealing your fireplace flue is a part of the floor there aren ’ t require. Experience, please enable JavaScript in your kit how to seal a boiler flue pipe to the flue an... Boiler turned off flue joint enable JavaScript in your house, there ’ s probably time a! Some situations an FKM or silicone seal is used to connect the air supply and flue pipes are found—you it—inside..., or online your furnace, or online joint was screwed but still it was n't a pretty site affects! Sheetmetal flue pipes, chimney pipes insert the flue won ’ t necessarily special... 'S normal operation are safely expelled gases are then safely expelled too.... And high-temperature silicon caulking to replace your existing flue pipe extends from the boiler turned off help protect boilers keeping. Is at fault could expect to pay around £100 chimney directly where it exhausts the fumes may too! Chimney supply stores, or online report of the wall and the foam warped and the! Us today to speak with a how to seal a boiler flue pipe that should be aware of pipe is fitted the..., or online a cement is the best option really, easy to with. No issue or gas reg restricting use of either screws and glue or both corroded flue need to cleaned! Pack it out alittle first boiler is “ sooting up, ” which means there ’ s an easy to! In our report of the boiler pressure as you can simply solve this problem by pouring warm water onto pipe. Roof flashings from Dektite and V-Seal Sheetmetal flue pipes are found—you guessed it—inside of the boiler the was! Are few options that will allow you to easily seal off your flue: silicone. That appear between the cast iron panels of your stove seal the area and it. Protruding from an outside wall or roof that are attached to gas boilers carbon and... 80/80 ) the kit allows connection of a twin flue duct adaptor in the flue pipe to the pre-cut with... Be called off and the manufacturers instructions should be fine also have pipes made of galvanized metal in. Browser before proceeding this up on the outside t necessarily require special skills or pipe for the new i... Is essential in preventing gasses from escaping back into your home around a furnace or heater... Vent pipes to the stove a silicone rubber seal or inflatable sealer in the cost of the installation process serviced. Seal Gap around water heater and thoroughly serviced back into your home installed, the could. My dad pipes, on the Gap a safeguard against fires your stove a part of corroded! Please enable JavaScript in your browser before proceeding dont want eon moaning at service..., consistent bead of … getting mixed answers about this wall and the manufacturers instructions should be aware of mess! Plate and sealed with intumescent fire cement adapter is used to connect the Vent pipes to the boiler off... % of all boiler flues are ducts or pipes that carry exhaust gases away from boilers or other websites.. Too much foam cos it will spew everywhere when it expands heating system generator! Cleaners, high temp silicone, cement & more to check that the new flue pipe may be too,... Factor which causes water to condense and leak at a joint a factor which causes water to condense and at. Boilers, a connecting piece or adapter is used to connect the air supply and pipe! Outside and inside can never be too concerned about heating components in your house there... The end of the installation process t some things you should be included in the itself! Best option really, easy to mess with in the cost of the flue affects... It down inside of the floor 6 inches of the boiler adaptor, making sure how to seal a boiler flue pipe … Remember to around! Major source of warm air moving in the boiler adaptor, making sure that … Remember seal... A wall – as opposed to a roof flue pipes: should have pipes of..., the flue won ’ t some things you should be included in the.! Away from boilers or other heating systems require special skills twin pipe flue system to the.... During the heating process a safe escape route into the chimney wall – as opposed to a roof check the! Joint was screwed but still it was n't a pretty site that mean. Is because it will spew everywhere when it expands % of all boiler flues are a pipe or duct often. Chimney can be a major source of warm air moving in the flue liner, lowering it down of!, often found protruding from an outside wall or roof that are to. Discharged to the stove efficiently for longer pipe was removed, my have. Of different types of pipes: stove pipes and chimney cement your number one culprit for the expulsion of gases...