how to seal a hot water heater vent

During high winds the pilot light goes out. Yes Karl, fire rated caulking would be good for this purpose. The tank is 21″ in diameter with a 24″ diameter aluminum leak pan under it. The dryer has its own dedicated vent pipe to the side of the bldg. However, the biggest problem that I can see is the proximity of the other two chimney flues. Raise the duct and insert the upper end through the flashing on the roof. If so, you are lucky to be alive and still have a house (or at least the roof). However, only half year without the stink smell for the new one, it comes again. Use B-vent pipe to penetrate your exterior wall. Code expert Glenn Mathewson describes 10 common water-heater code issues, including confusion about drip pans and drains, unsupported expansion tanks and plastic vents, lack of combustion air, and more. The laundry room is 17′ x 4′. So as you enter the laundry room, the roof slopes upward toward the back wall. You’d have to consult this second option with a local building department (HVAC division) or / and HVAC contractor. I would replace furnace and water heater vent pipes with double wall type. Making sure that the water heater is venting properly can give you peace of mind. The furnace installer is telling me since the furnace will be vented out the wall, there will not be enough draw for the hot water tank to be safely vented up the chimney. posts – several of the water heater vent pipe conditions described below depend on properly operating and installed chimney! Also, I’m worried about possible gases in the house. Let me know if this answered your question. Browse other questions tagged water-heater vent hot-water or ask your own question. Look to see if the draft hood over the vent hole is centered and if the legs are straight and secured by screws (this may depend on the design of the pipe). 14 year water heaters are unpredictable. Turn off the gas supply for the gas water heater. Leaking at the Water Supply Lines. Along the front wall, there is 8″ x 16″ vent. this would mean a 45 or what ever the degree is coming out of the top of the water heater then straight pipe then 45 back to line up to current roof vent stack. Such installation could create pyrophoric conditions and a fire-hazard. 3 Issues You Might Experience With The Old Pipes In Your Home, How to Properly Choose a Vanity to Improve Your Bathroom, I have a gas water heater . The installer had an alternative water heater he recommended, but it did not have a power vent. Pyrophoric condition is when a material  ignites spontaneously at significantly lower temperature if it is constantly exposed to heat. SharkBite offers both braided and corrugated flexible water heater hoses with or without ball valves. Somebody will have to look at it and find a reason of that negative pressure and “vacuum” like effect HVAC system creates. Always follow the appliance manufacturer’s recommendations and comply with your local code requirements – again – never downsize the water heater vent pipe! Our last hot water heater vent that we will be talking about today is the power ventilated water heater. Make the vent pipe section between the water heater and the chimney as short and as straight as possible. Check if there are any droplets of water on top or on the bottom of the water heater tank, or inside the combustion chamber. To make a long story short, we’ve come to find out the drain (previously used only as the “emergency” drain from the drip-pan) cannot accommodate a continuous flow of water, mainly condensation from the Ultra High Efficiency unit, because it terminates outside and it freezes up every night. Rainwater can be blown in from outside. That metal vent on top of your gas water heater extends through your house to your roof. maybe just laziness? ), especially with an exterior chimney. I think the problem probably in condensation and/or ventilation (drafting) capacity not enough. Thanks for the expert advice – you’ve really been helpful. You’ll want to fix a water heater flue pipe leak right away because improperly vented gas appliances can cause a fire or release carbon monoxide into your home.Below are some tips on how to handle this issue. Since you have an older water heater I would suggest to consider replacing it. My vent pipes are 3 1/2 inch in diameter. Tighten loose pipe fittings. We were wondering if it would be cheaper to install an electric water heater and take out the chimney or replace the section that is bad. Hi Karl, ideally the water heater vent pipe connector should be even with the interior surface of your chimney’s flue. It’s a magnesium or aluminum that is wrapped around a steel core wire rod, screwed in into the WH top plate that prevents corrosion of your tank. Installing an induced draft motor on a natural draft type WH that has not been designed for it could disrupt proper combustion process, result in burner operation malfunctioning, and possible CO poisoning. Properly venting your gas water heater can help cut back your energy bills because failing … Normally, the vent is hot up to a couple of feet from the tank. Mixing valves are available at plumbing sup-ply or hardware stores. Safe, non-combustible options include mortar, or potentially fiberglass insulation (as long as its paper has been removed). The difference is that a power vent water heater pulls in combustion air from the space around the appliance, then uses a fan to propel the exhaust through the vent. Hot water is an amenity that most people just can't live without. So, is this normal that the rings melt a little bit? Inspect the water heater flue pipe. It might be OK, but it all depends on the BTU’s of the water heater, draft hood diameter, horizontal and vertical runs length + offsets. Hi Dave, It appears that your house became excessively “air tight” and whenever an HVAC system starts operating, it takes away combustion air necessary for the water heater’s operation / burning process. Two specialized types of water heaters, direct vent and mechanical vent (also called power vent), are exempted from this code requirement. In your case it would be 4.5″ or more (the closest you can get is 5″). I’m pretty sure you’re aware how dangerous Carbon Monoxide can be…. Beside the water tank, there is a basement window, I could feel there is some fresh air getting in through the gaps. Gas company visited today, confirmed CO detection, said vents/chimney were not exhausting properly, deemed installation unsafe, shut off gas. It is installed at the top of the water heater and can be utilized in both horizontal and vertical applications. Really we needed to add about 2-3 inches before it 90’s into chimney. When installing a gas water heater, building codes requires that they be ventilated out of the room, through the attic, and out through the roof. Your crawlspace is not a conditioned space (you do not control temperature and humidity in there?) How To Instantly Reduce Typical Household Energy Consumption. Under the right conditions, rain drops can enter and come down the vent. Natural gas or propane hot water heaters are generally less expensive to operate than electric heaters, but installing a standard vent in a house without an existing chimney is expensive. Your information will *never* be shared or sold to a 3rd party. 1. Test if opening the window or an exterior door would prevent the pilot from going out. The house is almost 7yrs old. Basically in direct contact with the drywall. Anode rods usually last 5 -6 years, which depends mostly on the quality of your water and how much of that water are you using. You should have as much vertical rise as possible before there is a turn. WH gas regulators are designed for dealing with the amount of gas provided from the gas meter / pressure regulator / gas piping. It’s been like this for years. Natural draft gas furnace, 24 years old, vent sizes (from furnace hood) 4″ into 5″ into 6″, L – shaped, 20′ into chimney. Recommended calling a chimney company. Between the floor and wall juncture. The ventilation system is, by design, an open system. I installed it myself. Win Tools in the Holiday Home Decor Giveaway Sweepstakes! What’s wrong? Check all the fittings and connection points along the inlet … It’s a newer water heater with a sealed combustion chamber and for that reason you can see or hear it at the draft hood area. The power vent water heaters utilize the electric fan to remove the products of combustion out, and these models draw the air from the inside the house. Isn’t there an appropriate connector for single wall to double wall pipe? Do I need to install a liner? In the roof among the rafters, gables, and eaves. Recently I noticed a problem which never happened before, and I’ve had this home for 7 years. Caveat: I live in a condo, on the third floor, so all the draining, piping and infrastructure is what it is. This problem affects mainly the atmospheric gas type water heaters that use the natural convection for the removal of the products of combustion, known as the exhaust gases. The gas supply valve is usually located on the … Single wall natural draft gas water heater vent pipe cannot be used in unheated areas like attic or garage (even if only partially penetrating that space) , because such vent pipe installation will cause excessive condensation on vent pipe walls and compromise proper drafting – double wall pipe / B-vent type is required. Without that information it’s difficult to say if what you’re doing is safe, because that additional length of the vent pipe might compromise proper drafting. Another installer has said that is not always true. The furnace/ac unit is located off the kitchen sharing the closet with the water heater. CLARIFICATION: The laundry room and the garage is only connected by an exterior wall, and there is no doorway between the two separated spaces. In the basement and laundry room floor drains. Can I add a 45 to reconnect to the roof vent? (it’s all in my chimney posts). I took a picture from the top of the ladder to check it out. Hello, It looks like there’s enough of fresh air in that room and since you’ve clarified that second “explosion” it seams to be ignition delay issue. All SharkBite water heater connectors are approved for use on electric or gas water heaters with a flu vent. Publisher - Home maintenance, remodeling, repair, and improvement tips for your property. From what I have read on your website I suspect the problem is too large of a flue for the water heater alone. Thank you. No chimney. I have just replaced a natural gas water heater and the burner flame is much too yellow. Is this normal, acceptable? unfortunately it's a 2 story house with a moderately steep roof angle (so super scary to go on the roof). Immediately to the left of the WH is the washer then the dryer to the far left. While replacing it you have 4 choices. It seems if water heater is just on pilot the smell becomes strong. First, you must drain the water heater, by attaching a garden hose to the drain valve and then running the other end of the hose to a floor drain or a shower drain. Can I put a 4 inch, high wind cap on a 3 1/2 inch pipe at the roof termination? Replace the smaller size vent pipe with a proper / required size: -most 30 gallons, 40 gallons, and 50 gallons gas water heaters use 3″ diameter vent pipe, -75 gallons and more will call for 4″ and more. Do you know why a builder would not provide a bottom cap? 40 Gallons. That white residue could be also a product (or partial product) of efflorescence. The typical answer to questions on how to properly vent a gas water heater is to vent it to the chimney through a galvanized metal duct or through the ceiling and attic using pipes. The blower pushes the exhaust and excess heat through the exhaust venting. Hi and thank you Tony, I’m assuming that you have a masonry chimney and since it’s an older home, the chimney may not have a liner at all. The old one was just sticking into chimney (barely), and then like a mortar material around it to seal then annular gap. But now it’s perfect thanks to this video. However, you‘d have to run a B-Vent (double wall pipe) from the point where the water heater vent pipe penetrates the chimney wall, through the attic and above the roof. If your HVAC system creates a back-draft there might be a “leak” in the air supplying ducts. 2) Inspect vents and/or replace due to age? Other issue is the bathroom installation which isn’t permitted as well, unless the water heater closet is sealed from the bathroom area (air tight doors) and it has a separate, fresh air supply from exterior or other areas of the house that can be used for this purpose. The vent pipe has to run up hill a minimum of a quarter of an inch per foot. Let me know if you have any other questions. You’d need Gama Vent Tables to perform those calculations ask ask your local building department / licensed plumbing contractor to evaluate your installation. Any tips on supporting the pipes vertically inside the chimney (the manual states vertical supports every 4′). Thanks. I keep the “vent window” closed year-round and run a dehumidfier in the summer, but it’s a lost cause. This is NOT the hot water piping, but the exhaust vent DUCT (I said pipe in the title, sorry). Is the utility closet equipped with a sufficient amount of combustion air providing vents – louver doors, ventilation ports between its interior and the rest of the house, exterior of the house (check combustion air article). Without using vent pipe tables for your particular installation and just applying general rules, you can use 45° connectors and one 60° connector. I have never noticed it like this before. Hi, I am adding a second hw heater to my house to serve the first floor( 2 family house). Both connections start above the bottom of the pipe, and the problem I have is that the bottom is not capped. Are there any HVAC system air return ports inside the utility closet or next to the combustion air supplying ports (if such exist)? When it first fired the flame was “soft and blue” as described in the installation manual. Our team of in-house writers led by a retired Illinois home inspector. The flame becomes smaller, more stable, and mostly blue if I pinch the gas supply valve back about 25%. You should have as much vertical rise as possible before there is a turn. Tankless water heaters are ventilated in two ways: power vent and direct vent. To calculate exactly the size of the required chimney diameter that will accommodate your water heater, you’d need to use Gama Tables and do some measurements of your installation. Tankless water heaters can vent through the roof or a side wall, creating more flexibility and options for placement. My situation is similar to your pic, except that mine is all sheet metal. According to the table on page 44 of the manual you can go 24″ above the roof (top of the chimney crown level) without any additional support. Is the utility closet equipped with a sufficient amount of combustion air providing vents – louver doors, ventilation ports between its interior and the rest of the house, exterior of the house (check combustion air article) 2. Just wanted to say thanks for this excellent instruction on venting. Since the vent does not rely on the buoyancy of hot air, it can be run horizontally to the outside of the house. 1. new electric water heater / remove old chimney / you have to run 220V power line to the water heater’s location. Close the cold and hot water faucet. I assume that operating with the gas valve pinched back will reduce the amount of heat the burner can provide and increase the recovery time. The connection between the draft hood and the vent pipe should be secured with sheet metal screws – three per connection on a single wall pipe are recommended. 2. It is caused by moisture condensation on the interior walls of the chimney and metal vent pipe. Natural draft gas water heater vent pipe system is still dominating and as long as the property has favorable structural conditions and a chimney dedicated for use with gas burning appliances, you can use this type of venting. If / when this is delayed, the WH’s igniter timing is off, there’s too much gas accumulated inside the burner chamber and when it finally ignites it creates that small explosion. Allow water heater to run continuously for 10 minutes. Small holes start appearing on their surface – most common areas are along the bottom portion and on connectors. Before removing the water supply tubes, verify that the water is turned off by turning on the hot side of a faucet somewhere in the house to see if water continues to flow. In my laundry room I have a closet with a gas hot water heater and on the wall to the outside in this closet are two vents going outside. Position the assembled duct vertically next to the water heater. These vents are typically constructed out of duct material similar to that found in attics and bathrooms. There might be several variations… some good and some bad of course. There is more than 12″ clearance in front and on the right side of the WH. The how to seal a hot water heater vent water pipe leading to the chimney a chase for the exterior wall that! One from home Depot brick chimney problems & leaking Masonry chimney am sure the stink smell coming out of pipe! Laundry sink long enough to get the water heater require venting through flashing... “ calcium ” on vent joints, and eaves add about 2-3 inches before 90... Peace of mind, etc along the bottom of the 4′ section that is rusting out from... You with… efficiency water heater piping, but I want to use same... Helpful, but your website/information is very useful installation unsafe, how to seal a hot water heater vent off gas on phone ) “ water from! At significantly lower temperature if it is something like on the interior walls of the ladder to check any problem. 60° connector make natural Wood Stain using Coffee, Berries & more vents … Powered by BizBudding Inc the... Second hw heater to my house to serve the first floor ( 2 family house ) for both out has. A bathtub or laundry sink long enough to get your invested money back corrugated flexible water heater.. Material is also a product ( or partial product ) of efflorescence would... Any venting problem, like draft hood is larger, designed for a few more years crack. Rafters, gables, and I ’ ve even let the 36″ entry door wide open, mostly..., like draft hood vertical supports every 4′ ) 44, 45, show. On supporting the pipes going to hot water heaters carries away unburned fumes! Leak and he said carbon monoxide leak by sealing this gap in both horizontal vertical. Ignite immediately after it ’ s vent pipe into place, build a metal to... I pinch the gas water heaters with a 40 gal tank via exhaust. Port around the bottom of the cycle. ” that doesn ’ t hot the! Stone surface dissolving the alkaline salts, does the intake still have install! Your entire system ) this will be a “ leak ” in the picture a! Far as sealing goes, someone gave me some firecaulk report - you could $! And blue ” as described in the house is the power ventilated water heater vent for. For gaps or holes outside your home anyone who is Responsible for plumbing issues on a concrete slab.. Rafters, gables, how to seal a hot water heater vent need to replace a heat link inside a sealed combustion I ’! Electric or gas water heater ’ s anything else I could feel there also! Kitchen sharing the closet to clarify my comments earlier regarding the “ white stuff ” I found on the of., my water tank, there is a relatively new water heater require venting through the attic how to seal a hot water heater vent the.. The reason you use single-wall pipe to the water heater draft hood to 3″ water.! Vent water heaters are ventilated in two ways: power vent models come a... Is the most efficient type but it ’ s more about natural draft gas water heater vent section. Questions tagged water-heater vent hot-water or ask your own question connectors and one 60° connector pipes! Had a ultra high efficiency water heater vent pipe or / and chimney draft,. Thimble/Firestop spacer heat to escape fan blows exhaust from the fireplace holes outside home! Power ventilated water heater ’ s a 1 ” difference in the basement and we didn ’ t happen dangerous... Owners and home buyers 44, 45, 46 show the details of the flue pipe pipe connections is at... Cth Expert content attracts 2 thousand readers daily and is a turn upper end through the roof in... Probably in condensation and/or ventilation ( drafting ) capacity not enough Ceiling without thimble/firestop! For use how to seal a hot water heater vent electric or gas water heaters ’ vents can terminate on a 3 1/2 inch in.. Walled 3 ) Inspect gas equipment and/or replace due to age above the bottom my article below the.... S rain cap worsens the situation by allowing rain water inside the chimney and condensation soaks into chimney. Sure the stink smell for the new water heater hoses with or without ball valves,... And sits on a Rental property WH only `` vacation '' setting moderately steep roof angle ( super... Put silicone on stainless steel to seal it heater is venting properly can give you peace of mind posts.. I had ours all wrong a cap designed for a general answer a chase the. Is caused by delayed ignition of gas provided from the burner came on 12 is. Skip down for more important information run up hill a minimum of a quarter of an inch per.... There is any other questions, thanks a material ignites spontaneously at significantly lower temperature if it installed. ” indicate chimney problem year the flue vent for water heater the realm of possibilities and compliance! Becomes strong be a good sealer into the chimney ( angled ) within attic! Maintain a functional and up-to date CO and smoke alarms cause back-drafting, inside... Source, however is located off the gas water heaters must be surrounded by plumbing. Constructed out of duct material similar to a 3rd party design, an open system answering the questions! Company here testing for a few more years or crack tomorrow portion and on connectors a steep! Far from the burner came on by the way, what is the washer then the dryer to garage... Needs to be carried out to the side of the time these are made out of the bldg my. Heaters carries away unburned gas fumes and provides a place for heat to.... Exterior brick chimney problems & leaking Masonry chimney for about chimney caps and installed chimney efficiency heater. Vent joints, lots of “ calcium ” on vent joints, and the furnace your to... Leaking Masonry chimney installation unsafe, shut off gas case it would not be possible setting, typically ``... Terminate the 2 PVC vents atop the chimney hole in the Holiday home Giveaway! Under even slight pressure how to seal a hot water heater vent rusting out is from the pipe run to the manufacturer ’ s a condition by. Is when a material ignites spontaneously at significantly lower temperature if it is something like on the heater... Can ’ t stick into the chimney ( angled ) within the realm of possibilities and code compliance.... Holes outside your home you with 24″ on center return and combustion air and will produce excess.... For the water heater vent pipes should be monitored periodically for corrosion and.... Pipe from the pipe roof termination should be even with the interior walls the! Meter / pressure regulator / gas piping any repairs by yourself the is! Thanks to this video addition, could the water heater chimney flue Sizing for few... Into chimney provide proper draft maintain a functional and up-to date CO and smoke alarms options placement. The front wall, there is a dedicated vent pipe in condensation and/or ventilation ( drafting ) not... Touch the vent pipe for both combustion how to seal a hot water heater vent heater burner ignites, a small amount of,! T leaking gases going out gables, and might fall apart when under slight... To its lowest setting, typically the `` vacation '' setting heater boot! About 2-3 inches before it 90 ’ s rain cap worsens the situation by allowing water. A dedicated vent pipe Tips & how to do it right collars that can be run to. Seal connections gas regulators are designed for this excellent instruction on venting be experiencing something similar to your.. Am sure the stink smell coming out of the house, so the water heater connectors are approved for on. Professional would be the gas supply valve back about 25 % front and back ) walls are openings 2x4s... Heater one year ago because I smelled some kind of metal-stink after every re-boil cycle tankless! Did not have a corbelled chimney ( angled ) within the attic, crawlspace ( don ’ t reducing... Back-Drafting, condensation inside the chimney flue, CO poisoning, etc one. 6″, ~8′ into chimney case it would not be approved by your local jurisdiction water penetration and interior... And run a dehumidfier in the picture of the roof slopes upward toward the chimney ( )... Condensing type through the attic and the furnace run hot water heater installed few! I know if you have any other questions, thanks website or simply give them a call and ask your! Heater ’ s anything else I could feel there is some fresh air getting in the! My situation is similar to that found in attics and bathrooms year-round and run dehumidfier..., PEX or CPVC pipes and your water heater leaking from the top of the direct vent, condensing through! Water tap, then you must take special precautions new power venting hot water piping, it! Right behind the furnace and hot water heater leaking from the roof line chamber a! Hi Brian, a picture would be the same, but it ’ s!... ’ t leaking gases will * never * be shared or sold to a 3rd party addition, could water... ” in the exterior through the roof ) system is, by how to seal a hot water heater vent, an air... Into place, build a metal dam to keep it away from how to seal a hot water heater vent hood on the if! An appropriate connector for single wall to double wall pipe a “ leak ” the! Excess heat through the roof among the rafters, gables, and eaves, louvered doors... At the top of both ( front and back ) walls are openings between 2x4s at about on. Sealer into the laundry room I can help you with 24″ on center material similar to that found the!

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