Ask Me Help Desk - Draining into a vent pipe

Hi, I'm in the process of purchasing a house and I seem to be getting mixed answers to this question. I want to move the slop sink and washing mashine from the half bath that's located right above the basement section that I want to install it in. there is no sump pump or additional drain pipes in the basement currently. There is only an exposed cleanout, but it's located way on the opposite side of where I want the new laundry room.
There is, however about 1 1/2 feet of vent pipe exposed about 6 feet from the floor. It leads directly to the roof. Can I install the slop sink with an electric pump and have the washer drain into the sink, which will be pumped into the vent pipe?
Since I'm not in the home yet, I can't recall what the plumbing looks like in the current half bath above the basement. I am, however, positive that the only VISIBLE plumbing in the basement is the vent pipe. I keep getting mixed answers that it will work or it's against code to make the current vent a wet vent. Which is correct?
Also, the pump I'm referring to is a HARTELL LTA-1 that does not require a vent. But if I use that, can I still drain into the current vent in the basement? I have no idea what direction or what distance that vent travels to the sewer line that's behind the cinder block.
Any pictures that you can direct me to in addition to your answer would be great. Thanks so much.

Quote:

there is, however about 1 1/2 feet of vent pipe exposed about 6 feet from the floor. It leads directly to the roof. Can I install the slop sink with an electric pump and have the washer drain into the sink, which will be pumped into the vent pipe?

Something's has just got to drain into that "vent pipe" from above. What size is the pipe? Is it horizontal or vertical? It makes no sense to install a dry vent from the basement to the roof. Your pump directions states, specifically, that the 1 "discharge pipe need not be connected to a stack.(see image) I can see no terminal suggested in the installation instructions so I assume that it's terminated outside the building. Is there a floor drain in your basement?
I'm concerned that unless you discharge out side or tie the discharge line back to a dry vent at least 6 inches over the flood rim of the fixture that's vented that a discharge down this "vent pipe" will dump into the 1" pipe from the pump and clog the system. I need to know more information about the " pipe from the pump and clog the system. I need to know more information about the " you plan on discharging into. Back to you, Tom

Hi Tom,
Thanks for responding. I obviously don't know too much about plumbing. My home inspector told me that that pipe was a vent pipe. I don't know if anything is tied into it from above. Like I said, there are currently a slop sink and washer directly above the pipe, but I don't know if they drain into that pipe, or their drainage is concealed by the block basement wall.
To the best of my recollection, it is a 2" vertical pipe. I was planning on tying the HARTELL pump's 1" discharge into this pipe, which is about 6' off the ground. So, if I'm reading your response correctly, should be okay since it's more than 6" above the flood line?
You said that the pump's directions don't require a stack and there is no terminal? I'm sorry, but I don't know what that means? I'm assuming a terminal is a drain? If so, can't it drain into that pipe?
You also stated that the vent pipe wouldn't go from basement to roof, but I am imagining the system is built similar to this attachment that shows a vent pipe from basement to roof? Am I looking at a wrong diagram?
Sorry for the inconvenience, but I can't relax until I get this answered, so I know what I'm in for when I move in.

http://www.hometips.com/images/hyhw/plumbing/75.gif

Jarhead, You're making extra work for me. Please add to your olod post and don't start a new thread every time you post. Then I have to go back every time and merge the post you put up. Thanks!

Quote:

My home inspector told me that that pipe was a vent pipe. I don't know if anything is tied into it from above. Like I said, there are currently a slop sink and washer directly above the pipe, but I don't know if they drain into that pipe,

your inspector used the wrong term. If y6here's a slop sink and a washer station directly above then that pipe receives the discharge from both and that makes it a stack vent, not a pure vent.

Quote:

You also stated that the vent pipe wouldn't go from basement to roof,

Not quite what I said. I said, " It makes no sense to install a dry vent from the basement to the roof. Since you told me about the fixtures directly above it makes sense now.
To answer your questions you must answer mine. Second time I've asked!
1) this "vent pipe", is it horizontal or vertical? 2)Is there a floor drain in your basement? Answer this or we can not procede

Quote:

You also stated that the vent pipe wouldn't go from basement to roof, but I am imagining the system is built similar to this attachment that shows a vent pipe from basement to roof? Am I looking at a wrong diagram?

You're looking at the correct drawing. You're just misreading it. Note that the pipe doesn't become a vent,( vent stack) until after the uppermost fixtures.
Below those the pipe morphs into a soil pipe,(stack vent) Your inspector mis informed you if he told you it was a vent stack. To terminate a line simply means to end it. Now answer me and let's get on with it. Tom

Well,
Hopefully I'm misreading the arrogance! Like I said originally... THERE ARE NO DRAINS IN THE BASEMENT... obviously... which is why I'm asking the question to begin with, otherwise I'd just use the drain. And, it is a vertical pipe. I couldn't have been more polite explaining my lack of plumbing experience, which is why this website exists. If you wish to remain arrogant, there's no need to repond. Thanks.

Quote:

Originally Posted by jarhead426

Well,
Hopefully I'm misreading the arrogance!! Like I said originally...THERE ARE NO DRAINS IN THE BASEMENT...obviously...which is why I'm asking the question to begin with, otherwise I'd just use the drain. And, it is a vertical pipe. I couldn't have been more polite explaining my lack of plumbing experience, which is why this website exists. If you wish to remain arrogant, there's no need to repond. Thanks.

My! My! Aren't we sensitive? I had to ask you three times whether the "vent" pipe was vertical or horizontal and at last you answered me . Or did it make you "huffy" when I asked you not to make extra work for me? Please explain my "arrogance" to me. Perhaps it was when I took the time to explain vent stacks and stack vents. Oh well! If I've hurt your feelings I'm real sorry. Since you answered my question we can proceed. You will cut in a wye with a 1 1/2" branch on the stack, (it's no longer a vent) and connect the discharge into that using a compression fitting which will make it a closed system.
More questions? Just ask. But remember, I ask questiond for a reason and If I don't get answers back I can't respond. Regards, Tom