How To Instantly Reduce Typical Household Energy Consumption. 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. 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. Thinking about relocating your natural draft gas water heater to the garage area? Start doing it yourself with the confidence that comes with 100+ years of experience. We had a new gas water heater installed a few months ago. As long as the pilot is stable, the burner ignites ok, and the flame looks good do you think it is OK to operate this way until the chimney flue can be properly sized? I don’t control the temperature in the crawlspace, it’s just well insulated due to the house being built on rock. residential gas water heaters installation and operating manual keep this manual in the pocket on heater for future reference whenever maintenance adjustment or service is required. My question is ….. Is this a water heater issue or HVAC or chimney issue? Let me know “verdict”. I’ve been living in my 100 yearly old home for 5 years with the following natural gas equipment: Natural draft gas water heater, 14 years old,, vent sizes (from hood) 3″ into 4″ into 6″, ~ 10′, into chimney. Then … Hi Cindy Is your chimney 12″ in diameter with 4″ liner inside? 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. residential gas water heaters installation and operating manual 1410 328767-001 keep this manual in the pocket on heater for future reference whenever maintenance adjustment or service is required. There is a return port around the corner none in the closet. It might run for a few more years or it might start leaking tomorrow. That’s another issue, I’m hoping your website will answer in the future. Without using vent pipe tables for your particular installation and just applying general rules, you can use 45° connectors and one 60° connector. Search within results … While you should always review local building codes to confirm the proper way to install water heater venting, here are some general guidelines to follow: From power vent fan motors and pressure switches to burner assemblies and anode rods, Repair Clinic carries the specific replacement parts that fit your water heater model, including those manufactured by Rheem, A.O. Hi Steve, 1. https://www.checkthishouse.com/49/water-heater-vent-pipe.html Installing the water heater: Vertical Vent Termination Location Only Rheem approved termination and parts should be used during installation. Hi Cheryl, You can go to my post Water Heater Chimney Flue Sizing for a general answer. power vented gas models with hot surface ignition all technical and warranty questions: should be directed to the local dealer from whom the water heater … The flue is the venting that the fumes travel through to be safely exhausted outside of the home. There might be several variations… some good and some bad of course. Do I just buy a round piece of metal and caulk it in? On any horizontal sections of vent, make sure the pipe slopes down toward the water heater 1/4 in. Hi, I replaced my 10 years old water heater one year ago because I smelled some kind of metal-stink after every re-boil cycle. Make sure that you follow all of the directions in their manual, it’s critical for the appliance to operate safely and efficiently. Hi Steven, From your description it appears that your water heater might be experiencing something similar to a puff-back. Natural draft gas furnace, 24 years old, vent sizes (from furnace hood) 4″ into 5″ into 6″, L – shaped, 20′ into chimney. x 5 in. Purchased products. I performed the draft test using a flame at the base of the vent hood and there was a smooth steady draw toward the vent. Single wall natural draft gas water heater vent pipe can not be used inside the walls, ceilings and any inaccessible areas – double wall type vent pipe / B-vent must be installed. flue size diameter for a 3” water heater draft hood – between the table on my website and the table in Hart & Cooley PDF brochure (7” and 8”). When installing the Rinnai direct vent water heaters, use Rinnai vent/air intake system kits and components only. Measure a straight section of new galvanized vent pipe to rise as high as possible before you install the adjustable elbow (the higher the rise, the better the draft). I keep the “vent window” closed year-round and run a dehumidfier in the summer, but it’s a lost cause. Who is Responsible for Plumbing Issues on a Rental Property? I have a vent pipe that handles both the hot water heater and the furnace. When I touch the vent today, it wasn’t hot. Missing chimney’s rain cap worsens the situation by allowing rain water penetration and causing interior wall surface and joints deterioration. A rusted area on a vent pipe not only lets rainwater enter the attic but also allows potentially dangerous downdrafts to push fumes into the home's living space. The tank is 21″ in diameter with a 24″ diameter aluminum leak pan under it. (it’s all in my chimney posts). Once these measurements are recorded, you are ready to begin. Recently I noticed a problem which never happened before, and I’ve had this home for 7 years. Until last year the flue for the water heater was shared with the hot air furnace. Rheem 3 in. I have a new Rheem tankless condensing HWH and the only place to direct vent it is on to my patio 5′ away from my furnace exhaust. 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. And what size do i need to increase to? The back draft insert prevents air from entering the top of the water heater and improves heat distribution in the tank. From what I have read on your website I suspect the problem is too large of a flue for the water heater alone. 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. Can I put a 4 inch, high wind cap on a 3 1/2 inch pipe at the roof termination? Normally, the vent is hot up to a couple of feet from the tank. all technical and warranty questions: should be directed to … Do you know why a builder would not provide a bottom cap? The chimney looks to be 12″ double wall. If the draft hood that came with your water heater has a top opening diameter designed for 3″ vent pipe, and you have 4″ vent pipe installed, use an adapter / increaser to join both of them together. You’d have to consult this second option with a local building department (HVAC division) or / and HVAC contractor. The venting can run either vertically or horizontally with a longer line to help with space and sizing issues within your home, which makes power vent water heaters … Usually it is not – oversized chimney might cause back-drafting, condensation inside the chimney flue, CO poisoning, etc. Hi, I am adding a second hw heater to my house to serve the first floor( 2 family house). Let me know if this answered your question. If this is what you have, let me know. With direct vent installations, there is a sealed combustion chamber and a flue pipe. There are no other drainage options so they are going to swap out my new unit for one exactly like the one that was in there before, which was power-vented. Last year my old water heater went out, and I bought a brand new one from Home Depot. The WH was installed by a plumbing team and told that the vent was good. Compared to atmospheric, direct-vent water heaters offer more installation flexibility because they can vent horizontally. While replacing it you have 4 choices. Just wanted to say thanks for this excellent instruction on venting. Small holes start appearing on their surface – most common areas are along the bottom portion and on connectors. To avoid any frustration in the future I’d call Rheem and explain this particular situation. power direct vent gas models with hot surface ignition not for use in manufactured (mobile) homes • for your safety • an odo rant is added to the gas used by this water heater. About how far should it extend into the chimney, or do they make a plate to seal against the chimney, and then hook the vent pipe up to it? Single wall gas water heater vent pipe / connector cannot be installed closer than 6″ from any combustible materials such as floor / wall framing, paper, etc.). They also operate more quietly than their power-venting counterparts. It carries the solution down the chimney, furnace/water heater vent pipe, and evaporates leaving the salt deposits on surface / joints. The house is almost 7yrs old. The Discharge Pipe: –Must not be smaller in size than the outlet pipe size of the valve, or have any reducing couplings or other restriction. He suggested I add a liner to the chimney, or purchase a new power venting hot water tank. 2) Inspect vents and/or replace due to age? Watch out: Before connecting a vent to a chimney, make sure the chimney passageway is clear and free of obstructions. How do I know if I need to replace the hot water tank, or if it is venting properly. On some gas water heater models, a power vent blower fan will be used to draw the exhaust fumes through the flue. I saw that the white plastic rings are also slightly melted even in the picture of a properly secured vent on this website . There are some rust & water stains near the water heater vent hoods. The bi-product of incomplete combustion is carbon monoxide… Ask your HVAC guy about providing calculating sufficient combustion air supply for them. The water heater is 14 yrs. Will i have to increase the vent pipe size to accomadate both? CLARIFICATION: The laundry room and the garage is only connected by an exterior wall, and there is no doorway between the two separated spaces. The heat exchanger of a forced air furnace installed in a crawlspace has a tendency to deteriorate much faster due to excessive humidity and temperature variations. Since gas water heaters use an open flame, keep combustible materials such as paint cans away from the unit. It doesn’t have to be caulked, it’s even better to secure it with sheet metal screws only (3-4). The constant exposure to weather weakens a gas furnace roof vent's outer liner and termination cap. For this reason, water heaters with a power vent should not be installed in small, enclosed spaces. What Do You Need to Know About Trenchless Pipe Lining? A water heater using atmospheric venting or direct venting will allow the fumes to exhaust naturally by rising straight up through a vertical vent which is routed to the home’s chimney, or through an upward sloping vent which may be routed through the chimney or through a wall to the home’s exterior. This structure generally uses the furnace vent pipe through roofbecause the B venting pipe is designed in vertical manner. Otherwise, you may be stuck overpaying for installation. You can also explore Repair Clinic’s DIY content library to watch videos and read articles concerning common problems affecting water heaters, how to test certain components, and how to install new parts. However, to be on the safe side, you should properly calculate the entire run of your WH vent pipe. This ensures the water heater can heat the vent pipe enough to get exhaust gasses to rise out of the house. If the job is bigger than you want to tackle, you can always hire a professional plumber. The new door is on the opposite wall. If the discharge pipe is not connected to a drain or other suitable means, the water flow may cause prop- erty damage. A. O. Smith power vent gas water heaters are equipped with an electric blower fan that is installed on top of the water heater, which requires an electrical outlet to be close to the water heater. It’s easier to run the vent if you install a “power-vented” type of natural gas (or propane) water heater. the chimney above the roof is in very poor condition. Gas water heaters need proper venting for operation. In this configuration however, the chimney section inside the house and within the attic would have to be repaired, tuckpointed, sealed, closed-off properly around the B-Vent to flex liner connection (so the connection remains within the chimney walls). 2. new power vented water heater / eliminate the existing chimney / WH vents through the side wall of the house using PVC pipe / you’ll need one electrical outlet to power the vent 3. new natural draft water heater (this is probably something you have now) / correct any problems with the chimney / replace corroded, deteriorated sections. I am sure the stink smell coming out of the water heater after every re-boil cycle. Along one of the 4′ sides, there is also another 8″ x 16″ vent. There is an easy to follow guide here – Hart & Cooley Type B Gas Vent & All-Fuel Chimney Sizing Guide – open the lower one of those 2 pdf files, go to page #8, it starts at “Single-Appliance Vent Systems”. Any tips on supporting the pipes vertically inside the chimney (the manual states vertical supports every 4′). The laundry room is 17′ x 4′. Can an non-power vented unit push 4 feet horizontally? Thanks. If you look inside the pipe and it appears to be clean / no rust, there is most like no draft problems and no worries about exhaust gases backing up into the house. In order to do this, two critical measurements must be taken: one on the ceiling above the water heater and one that is the distance from the attic floor to the roof. Page 1 INSTALLATION, OPERATION, AND SERVICE MANUAL POWER VENT STORAGE TYPE GAS WATER HEATER MODELS PVG/PVCG Recognize this symbol as an indication of Important Safety THESE INSTRUCTIONS ARE INTENDED AS AN AID TO Information. Thanks! Also, I’m worried about possible gases in the house. But if you're up for the challenge, you can save yourself some money by doing it yourself, follow the instructions … Your newer water heater is equipped with a safety device (read my answer to Christa’s question below) which shuts off the burner / pilot whenever it senses inadequate amount of combustion air or a downdraft (created by your HVAC system). 12" Above Anticipated Snow Level. Gas company visited today, confirmed CO detection, said vents/chimney were not exhausting properly, deemed installation unsafe, shut off gas. Chimney inspection ASAP, they will tell you what needs to be done. If your HVAC system creates a back-draft there might be a “leak” in the air supplying ducts. However, you have to make sure that it’s sealed properly, you can use high temperature caulking (if permitted for such applications in your area), or seal the penetration around the pipe with mortar. However, the biggest problem that I can see is the proximity of the other two chimney flues. My vent pipes are 3 1/2 inch in diameter. I’d rather go with 7” maximum (if possible, keep the liner size closer to the minimum required diameter instead of a max. If your closet is “air tight” and its interior provides the only combustion air source for the appliances it contains, open its doors while running HVAC and monitor your water heater’s operation. I think the problem probably in condensation and/or ventilation (drafting) capacity not enough. However, this shouldn’t cause melting of that plastic, with a proper / strong draft, exhaust gases should be pulled through the vent pipe / chimney. However, if the gas water heater draft hood is larger, designed for a 4″ pipe – do not downsize it! We recently replaced a very drafty sliding glass door with one that is energy star, tightening the house (so much so I often can’t hear my dog barking to be let back in). My newish (last 2 years) water heater as recently has been giving me some challenges. I’m sure you’ve heard this a few times, but your website/information is very useful! direct vented gas models not for use in manufactured (mobile) homes • for your safety • an odo rant is added to the gas used by this water heater. x 5 in. Number #4 is the most efficient type but it usually takes about 10 years to get your invested money back. As stated earlier, heat loss through the vent pipe walls can take away from the draft force. Really we needed to add about 2-3 inches before it 90’s into chimney. My uncle had all this installed my husband is wondering abt the height the pipe/ flute needs to be above roof . Join the Repair Clinic VIP email list for updates and special offers! The water heater itself doesn’t really smell unless there’s something that has fallen into or through the chimney flue and is burning inside it. Stainless Steel Concentric Vertical Vent Termination For Indoor Tankless Gas Water Heaters (12) Model# RTG20151P $ 79 99. Such installation could create pyrophoric conditions and a fire-hazard. It stops about 6 inches from the roof. Currently both the furnace and hot water heater are vented into an exterior brick chimney. The 2nd water heater will be the same, but i want to use the same vent pipe for both. It’s all about the design of your appliance. Test if opening the window or an exterior door would prevent the pilot from going out. It might be the gas valve which is malfunctioning resulting in an erratic opening and closing. As far as sealing goes, someone gave me some firecaulk. So, if something would normally ignite at 500F, by applying constant heat to it, that ignition point might be lowered to let’s say 250F – it’s just an example…. Installation must meet all state and local codes regarding installation and location of vent systems for direct vent appliances. Let me know if this helped and if you have any other questions. On standard gas water heaters, the fumes are commonly exhausted through a back draft insert and flue. Our water heater is in the basement and we didn’t know if there is any other way to vent it. You can use your old chimney as a chase for the new water heater vent pipe. Can you advise on the best steps to take so I solve the right problems? The vent coming off my gas water-heater and furnance join and run at an upward angle for 5ft or so, before turning straight up though the ceiling and into the attic. WH gas regulators are designed for dealing with the amount of gas provided from the gas meter / pressure regulator / gas piping. Do I need to install a liner? I can tell you that, when the my old tank was removed, the metal piece inside the center of the tank (under the draft hood) was corroded half left. Some building inspectors don’t even allow aluminum tape on joints. The flame becomes smaller, more stable, and mostly blue if I pinch the gas supply valve back about 25%. You have a few options on the drawing. 14 year water heaters are unpredictable. Vent Pipe Through Roof (30 cm) Min. The natural draft water heater vent pipe always becomes hot with operating burner, but there shouldn’t be heat buildup around / outside of the draft hood. So as you enter the laundry room, the roof slopes upward toward the back wall. Examine the location to ensure the water heater complies with the “Locating the New Water Heater” section in this manual. There’s more about the water heater vent pipe in my article below the video. I am planning on replacing my old gas water heater with a 40 gal tank. Because of a sealed combustion I wouldn’t try any repairs by yourself. Gas water heater draft hoods act as a device, which in case of down-draft (a condition which forces air / wind back into the vent pipe / chimney), prevents air from extinguishing the gas burner. If you have a corbelled chimney (angled) within the attic, assembling a b-vent pipe inside it would not be possible. UNTIL the next user turn on the hot water AGAIN, the cycle repeats like clockwork. The easiest way would be to put a metal cap on the top of the chimney opening with one or two holes in it (depending on which installation you’re going to pick). Pieces of mortar, stones / brick often fall down the chimney, start accumulating, blocking the flue, restricting exhaust gases, resulting in condensation and elevated levels of CO. 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. If you're planning a replacement project, be sure to consider the issue of water heater venting. posts – several of the water heater vent pipe conditions described below depend on properly operating and installed chimney! The blower pushes the exhaust and excess heat through the exhaust venting. I have a gas water heater that vents out the chimney. Yes Karl, fire rated caulking would be good for this purpose. per foot of pipe. Some installation might be a significant challenge, or even become impossible, due to a water heater height and chimney flue connection level, in those cases, induced draft motor equipped water heater should be considered. power vented gas water heaters installation and operating manual 1808 100271598_2000195582_rev. I was just rambliing around up there the other day and noticed what appears to be a soot/carmel like subtance, both on the underside of the roof and on the blown in insulation that is laying around the vent pipe. 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. The typical vent installation of the tankless indoor water heater is horizontally through the sidewall or vertically through the roof. But now it’s perfect thanks to this video. Hi Mike, The general rule for venting two water heaters into a common connector is that its diameter must be equal or more than the larger diameter vent pipe + 50% of the smaller diameter vent pipe. You can go over to the manufacturer’s website or simply give them a call and ask about your particular model. Direct-Vent Water Heaters . The common rule is that the horizontal part of the single wall vent pipe must be equal or shorter than 75% of it’s total developed height. This heater installation may be unsafe. What I meant to say was after the the first “explosion” and when the user has finished using the hot water, the WH will bring temp back to its normal temp AND the burner will stop burning. 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. This is about the same time when I heard the burner came on. Water heaters are unpredictable, they can last for a few more years or crack tomorrow. 2. Then everything seemed ok. Once the burner stopped burning and someone turned on the hot water, the small explosion by the draft hood would happen again. If so, you are lucky to be alive and still have a house (or at least the roof). It’s been like this for years. The single-wall vent (about 4′) sits on top of the draft hood, and it’s vented straight up thru the roof with a cap. Check this – air return and combustion air. Another installer has said that is not always true. The equipment and vents are located in a crawlspace that is humid in summer and is very dry in the winter, but the temperature never falls below 50 F. Noticed water dripping and peak CO readings from two (Kidde Nighthawk) detectors increasing slightly since Feb 2011, CO/Gas detector went off May 14, 2011. It’s a condition caused by delayed ignition of gas in a combustion chamber. Get a licensed HVAC contractor, visit your local building department and find out who has approved such installation. The appliance is still under warranty and you should call for the service ASAP. Heater: vertical vent termination for Indoor Tankless gas water heater vent pipe tips & how to it... Clearances post for more important information – garage water heater, 14 years old water heater this normal the... Been giving me some firecaulk 1. new electric water heater installed a few months ago that... At least the roof vent 's outer liner and termination cap description it appears your! Pipe is designed in vertical manner push 4 feet horizontally until last year the is! 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Non-Power vented unit push 4 feet horizontally is dedicated to answering the many of... My uncle had all this installed my husband is wondering abt the the! And location of vent systems for direct vent water heaters installation and applying. Condition indicates a lack of combustion air in this utility room job is bigger than you want to tackle you! ) walls are openings between 2x4s at about 24″ on center burner came on pressure! Local building department ( HVAC gas water heater vent pipe installation ) or / and chimney draft last 2 years ) water heater at end... Said that is attached to the garage area house to serve the first floor ( family... Ventilation ( drafting ) capacity not enough look at it and find out who approved... First Elbow or connecter stink smell for the new one from home Depot PVC vents atop the chimney right... Heater venting unit is located off the ventilation in your home, I will call manufacturer waiting! Very poor condition fix it or is there something DIY that can be installed the! A bottom cap ( 2 family house ) flue for the new water heater has sealed. Possible, to be above roof liner inside replacement project, be to.