Originally Posted By: phinsperger This post was automatically imported from our archived forum.
This is a closed combustion system utilizing a concentric venting system. Not only is a draft hood not required, but in a closed combustion system it would not be proper to install one.
In the first pic, although I can't see clearly enough on my computer, I bet if you read the clear sticker with the black print it would tell you something to effect that it is a concentric venting system. They may use other wording but the concept is the same.
Basic concept of a concentric venting system is a double wall pipe with outside supply air brought in through the outer chamber and combusted exhaust gases are expelled through the inner chamber. Only one hole in the side of the house is needed.
Originally Posted By: rhinck This post was automatically imported from our archived forum.
James,
I don’t know about your area but PVC extension tubes are OK. As far as for the drip leg that should be more of a recomendation rather than a violation. Also, please don’t jump to conclusions quite so quickly, do a little research- didn’t that flue installation part look like it was made for that water heater? Don’t misunderstand me but it almost sounded as if you were overjoyed to find so many problems.
Originally Posted By: jpope This post was automatically imported from our archived forum.
James D Mosier wrote:
I also see a flexible gas supply line and no drip leg, both of which are not correct.
Flex appliance connectors are allowed (preferred) in many jurisdictions and drip legs are dictated by the local utility. I see no problem with that set up.
James D Mosier wrote:
It looks like the T&P valve has a plastic pipe extention, this is also wrong.
There are plastic pipes listed specifically for T&P discharge. It should be marked accordingly.
I agree with Paul, this does appear to be a closed combustion system, so manufacturers instructions would determine the flue configuration.
Other than the corrosion, there's not much to say about the water heater.
senomoto wrote:
The exterior vent will have to be raised when the heater is raised the 18" requirement from the floor
What are your thoughts.
No need to raise this heater - closed combustion - no accessible flame or ignition source. Check with manufacturers recommendations. . .
-- Jeff Pope
JPI Home Inspection Service
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