Author Topic: Installing the Anemometer in Roof Sewer Vent  (Read 358 times)

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Offline kaymann

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Installing the Anemometer in Roof Sewer Vent
« on: January 20, 2019, 07:41:16 PM »
Just wondering if anyone has installed an anemometer pole into the sewer vent pipe on a roof?
I know the vent pipe is PVC but if the anemometer is steel goes through the PVC vent (careful not to plug it), then the PVC is only keeping the anemometer straight.
The anemometer pipe would bare all the weight...

Has anyone  done this and your results?



Offline vreihen

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Re: Installing the Anemometer in Roof Sewer Vent
« Reply #1 on: January 20, 2019, 08:01:07 PM »
Sounds like a lightning rod waiting to burn your house down to me.....
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Offline Old Tele man

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Re: Installing the Anemometer in Roof Sewer Vent
« Reply #2 on: January 20, 2019, 10:00:57 PM »
Have you checked the 'depth' of the PVC piping? Often there's a "sewer glass" water-trap like offset just below the roof level. Otherwise should be OK if the metal pipe is left hollow too, so gas passes through for venting.
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Offline kaymann

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Re: Installing the Anemometer in Roof Sewer Vent
« Reply #3 on: January 21, 2019, 10:14:33 AM »
I do not remember seeing one but I will go look specifically for that water trap.
In my old house I had a galvanized flat attic vent the straddled a strut.
That made so easy to drill and attach directly to the strut.
I wanted to try this fume vent to avoid any drilling.
I have seen people attach clamps directly to the exterior of the vents but my vents are so short...
I will definitely not plug the TV antenna piping, I want those fumes to keep on going up :-)

VReihen in Arizona the standard is to use PVC from roof down to the drain pipe.
Then a galvanized fitting that shrouds the PVC is installed to make a negative seal with the roof.
Finally they curl the galvanized fitting into the PVC so no rain water can slip between the fitting and PVC.
My current house has six of these fume vents, and a rather tall furnace fume stack none of which are grounded...
My other option is to clamp to the furnace fume pipe (galvanized)
I am still debating on that one instead of the drain vent...

Randall



Offline miraculon

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Re: Installing the Anemometer in Roof Sewer Vent
« Reply #4 on: January 21, 2019, 11:50:51 AM »
I had a problem years ago where I had a kind of guy wire attached to the vent stack. Mine was all iron pipe transitioning to copper.

The pipe moved around inside of the rubber collar that surrounds the pipe causing a leak. I had to revamp my mounting completely and eliminate the side load.



The movement of the anemometer might cause a similar issue. Also, I wouldn't trust PVC for anything having wind load, it is not really intended for that purpose.

What kind of roof do you have? I think Ambient Weather has all kinds of mounting options. https://www.ambientweather.com/amwemoso.html

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Offline kaymann

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Re: Installing the Anemometer in Roof Sewer Vent
« Reply #5 on: January 22, 2019, 09:03:36 AM »
As I was looking for the water trap (none to be found) I found a vent right over a truss so it looks like I will be attaching the anemometer to the truss like the last time.
Thank you everyone for your thoughts and input!

Randall



Offline kaymann

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Re: Installing the Anemometer in Roof Sewer Vent
« Reply #6 on: January 26, 2019, 07:36:20 PM »
BTW when looking for a strong long pole to attach the anemometer to, I found in great supply chain-link fencing top rails in ten foot lengths.
using three feet under the roof still left me with seven feet over the roof. As far as lateral strength it seemed like over kill.
However when it comes to durability I have no worries about rust or bending.
I did paint the pole with Rustolem "Hammered" spray paint to take the shine out of it and blend in better with the background mountains.

Randall
« Last Edit: January 27, 2019, 12:07:43 AM by kaymann »



Offline Old Tele man

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Re: Installing the Anemometer in Roof Sewer Vent
« Reply #7 on: January 26, 2019, 08:10:19 PM »
Sounds vaguely familiar: I used 10-ft water pipe (with caps on each end), painted Rustoleum white, with bottom 3-ft embedded in concrete.
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