Evening folks, wonder if you all could bear with me and address what should be a simple issue but, because of too much time in the 70’s, is causing me to question myself tonight. Here goes, two things. First pic one of a hot water heater vent. If I’m reading code right that vent should be as short and straight as possible with 45 degree bends okay. I’m staring at two 90s? I know, I didn’t give you much in the way of a photo but any help would be appreciated. That horizontal run is about 8 inches. In the second photo, you see the same WH vent running straight into asbestos vent and then taped with foil. Would love to see that union. Any thoughts?? THANKS!