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Old 10-29-2016, 09:55 PM   #1
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Pen drain pipe in basement


Hi, can any one please explain what pen drain pipe is? I have two pipes going into sump in my basement. One is Radon and another is Pen drain. I couldn't get any information about pen drain pipe in internet. Please see the attachment for the photo.
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Old 10-29-2016, 10:30 PM   #2
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Re: Pen drain pipe in basement


No idea what a Pen drain is. Where does it come from? I'm not that familiar with radon systems but as I understand it they don't normally go into a wet drain - they extract air from below the pad and exhaust it outside. Are you sure the pipe (hidden behind the dehumidifier) goes into the sump? Also, that doesn't look like a sump drain but more like an ejector pump. Sump drains are usually open (although they may be covered) and used to extract ground water. Ejector pumps are normally sealed and used to eject grey water and sewage.
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Old 10-30-2016, 07:41 AM   #3
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Re: Pen drain pipe in basement


Follow the drain to see if it goes to something like a water softener or air exchanger.
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Old 10-30-2016, 11:21 AM   #4
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Re: Pen drain pipe in basement


@lenaitch , Thanks for the reply, I could not able to find the source of this pipe but I guess it may going some where up of the home. It could be as you said to extract and pump air to up.
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Old 10-30-2016, 12:38 PM   #5
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Re: Pen drain pipe in basement


Can we get more pictures. Particularly without the humidifier in the way.

Radon mitigation essentially sucks the air from under your slab and exhausts it outside. There's more then one type of setup. Just FYI, for anyone reading.

As for the pen drain, do you have any areas around your house that's below sewer level?

Go around pouring water down drains until a helper hears the sound in that pipe. Run out of drains? Move on to roof vents. My first guess would be something lower then sewer grade though.

Cheers!
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Old 10-30-2016, 08:31 PM   #6
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Re: Pen drain pipe in basement


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Originally Posted by k_pradeep View Post
@lenaitch , Thanks for the reply, I could not able to find the source of this pipe but I guess it may going some where up of the home. It could be as you said to extract and pump air to up.
I am guessing that the "radon" line goes through your floor near the sump/pump well but actually has nothing to do with it. It should exhaust out an exterior wall and should be easy to trace. I don't know if there is a fan or blower involved or if they are simply a venting system. It is the "pen drain" that might be helpful to trace and some other posts have offered suggestions on how to do that.
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Old 10-30-2016, 09:44 PM   #7
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Re: Pen drain pipe in basement


How did you hear about the term "pen drain"?
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Old 10-30-2016, 10:08 PM   #8
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Re: Pen drain pipe in basement


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Originally Posted by AllanJ View Post
How did you hear about the term "pen drain"?
It's written on the left-hand pipe in the OP photo. So far, nobody seems to know what it means.
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Old 10-30-2016, 11:27 PM   #9
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Re: Pen drain pipe in basement


It could be a more literal label.... A drain for a penned area... Or if a Den (bad penmanship?) that has a bar sink. Etc.

Cheers!
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Old 10-31-2016, 06:23 PM   #10
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Re: Pen drain pipe in basement


Maybe its a pan drain for a washer machine. Your plumber flunked spelling.
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Old 11-01-2016, 05:50 AM   #11
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Re: Pen drain pipe in basement


@Ghostmaker , may be my plumber flunked. I attached more pics. Pipe is going some where up.
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Pen drain pipe in basement-img_7571.jpg   Pen drain pipe in basement-img_7572.jpg  
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Old 11-01-2016, 05:59 AM   #12
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Re: Pen drain pipe in basement


@supers05 , I am seeing my sewer pipe is higher than the basement ground.
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Old 11-01-2016, 06:00 AM   #13
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Re: Pen drain pipe in basement


@lenaitch , please look at my new picture. this pipe is going down.
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Old 11-01-2016, 06:07 AM   #14
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Re: Pen drain pipe in basement


All that clears up is that you apparently have a passive radon system with a ejector pump using the same pit.

You have a unique build. Have you asked the builder?

Cheers!

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Old 11-01-2016, 04:38 PM   #15
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Re: Pen drain pipe in basement


As I mentioned above, I know virtually nothing about radon systems and it seems others think that the two systems sharing a pit is possible, if not a tad unusual.

I only assumed it was an ejector pump (sealed) as opposed to a sump pump (unsealed) since it looked like it from the photo viewed on a laptop. If it is an ejector pump, it needs to be vented, so perhaps that line is a vent. All of that said, it seems that we have not been able to answer your question about the cryptic label.
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