Gas water heater - aluminum duct

Over 698,000 strictly plumbing related posts

Plumbing education, information, advice, help and suggestions are provided by some of the most experienced plumbers who wish to "give back" to society. Since 1996 we have been the best online (strictly) PLUMBING advice site. If you have questions about plumbing, toilets, sinks, faucets, drains, sewers, water filters, venting, water heating, showers, pumps, and other strictly PLUMBING related issues then you've come to the right place. Please refrain from asking or discussing legal questions, or pricing, or where to purchase products, or any business issues, or for contractor referrals, or any other questions or issues not specifically related to plumbing. Keep all posts positive and absolutely no advertising. Our site is completely free, without ads or pop-ups and we don't tract you. We absolutely do not sell your personal information. We are made possible by:

Post New

How to Show Images

Newest Subjects

Gas water heater - aluminum duct
Author: Learning2 (NC) Had a new 75 gallon gas water heater installed. Guy used 2 4"aluminum (dryer duct) elbows instead of heavier galvanized as I would have expected. Is this code illegal, just bad practice, or OK? HIs it dangerous TODAY?
Post Reply

Re: Gas water heater - aluminum duct

Author: HawaiiPlumber (HI)

Most new effecient water heaters hardly put off any heat out of the vent. It depends on the Unit. I would feel the elbows while its firing and see if you have heat. Or read the manual and see what it requires for venting. Most new gas heaters can be vented with PVC because of the efficency of the heat transfer theres not much heat leaving the unit...its more for the emissions.

Post Reply

Re: Gas water heater - aluminum duct
Author: packy (MA) supposed to be 26 gauge thick pipe. any duct work pipe be it aluminum or 30 gauge galvanized is not legal..
Post Reply

Re: Gas water heater - aluminum duct
Author: Learning2 (NC) This is a Bradford-White "high input" 75 gallon model MI75S6BN. It is NOT a high efficency model. The exhaust is hot.
Post Reply

Re: Gas water heater - aluminum duct
Author: KCRoto (MO) Have the 'guy' come fix his error, then get the job inspected by the local building inspector or the gas company. If he put in dryer vent instead of flue piping, chances are the rest of the venting at least has issues.
Post Reply

Please note:

Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.

Search for plumbing parts on our sponsor's site:

Plbg Advisor List Common Plumbing Terms Find A Plumber Plumbing Manufacturers Directory theplumber.com

Special thanks to our sponsor:

to FAQ's - to popular subjects - to plumbing books - to Tankless 101 - to plumbing history - to helping charities - to contact us