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Old 01-20-2010, 10:38 PM   #1
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loose roof vent/rain cap?


I have a vent/rain cap on the roof that is loose. It is in danger of being blown away during storms. It covers the exhaust ducting to a wall heater.

Is there a way to tighten it? It is pretty old, the top of the exhaust ducting is rusty.

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Old 01-20-2010, 10:41 PM   #2
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loose roof vent/rain cap?


I've replaced the exhaust ducting for a water heater, I remember all the sections and the cap are twist and lock assembly. But again the top of this exhaust pipe is all rusty.

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Old 01-21-2010, 08:20 AM   #3
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loose roof vent/rain cap?


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Originally Posted by darsunt View Post
I have a vent/rain cap on the roof that is loose. It is in danger of being blown away during storms. It covers the exhaust ducting to a wall heater.

Is there a way to tighten it? It is pretty old, the top of the exhaust ducting is rusty.

Just get a new cap non locking type and use 1/4 zip screw. You need to replace and not take a chance of it blocking off the top. It will roll out on water heater.
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Old 01-21-2010, 09:57 PM   #4
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loose roof vent/rain cap?


Thanks. Yes, I should be able to screw it in.

All the hardware stores I've been to, I think they only have those round caps with slits in the sides, not the old oval profile caps. Is it hard to find those old style caps?

And what do you mean by 'blocking off the top'? I was going to reuse the old cap, but it sounds like it could shut off the airflow?
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