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wesryan · Dec 28, 2005, 12:47 PM

Hello all
I am new to this board so forgive me if this has already been asked. I am in the process of adding a basement to our basement. We have a septic system with the discharge pipe about 3 feet above the floor. Several questions. I want to add a Toilet, sink and tub. What all has to be vented. Where do most people tie into the vent at. Anyone have any pictures of their install. Thanks to all.

speedball1 · Dec 28, 2005, 01:22 PM

Adding a basement to a basement. Now there's a novel idea. (Just kidding, I know you meant bathroom)
First off let me give you a link where you can shop around for different types of ejectors. Click on; http://www.pumpshop.us/sewage-pumps.html
You ask about vents. You will need two vents. One dedicated vent that goes directly to the roof from the holding tank and another off the lavatory that you may revent back into a existing dry vent. You will also have to configure your rough in so it will wet vent the tub. Good luck, Tom

wesryan · Dec 28, 2005, 02:35 PM

Tom

Can you sketch something out. You are talking in a foreign language with the entire wet / dry venting. My plan was to vent everything into one line and tie it into one of my roof vents. Is this the way to do it.

Wes

speedball1 · Dec 28, 2005, 05:23 PM

Wes,

You will need two vents. One dedicated vent that goes directly to the roof from the holding tank and another off the lavatory that you may revent back into a existing dry vent. The drainage will go down like this. Toilet to the holding tank. The lavatory to connect to the toilet drain and a vent will raise out of the tee that you use to pick up the lavatory with. The tub/shower will connect to the lavatory drain and be wet vented by the lav vent.
I can't give you a drawing since I don't have a set of floor plans and have no idea how you plan on configuring your fixtures. More then happy to answer questions though. One question. Are you sure you have the plumbing experience to get into a major remodel such as the one you describe? It might pay you to hire someone to lay it out and make you a material list. Then I could walk you through the installation. Cheers, Tom

wesryan · Dec 28, 2005, 06:16 PM

Ok here is my drawing. Let me know if this is correct. Thanks again for your help.

speedball1 · Dec 29, 2005, 08:19 AM

Sorry Wes,

Your lay out don't get it. Let me repeat my earlier post.
You will need two vents. One dedicated vent that goes directly to the roof from the holding tank and another off the lavatory that you may revent back into a existing dry vent. The drainage will go down like this. Toilet to the holding tank. The lavatory to connect to the toilet drain and a vent will raise out of the tee that you use to pick up the lavatory with. The tub/shower will connect to the lavatory drain and be wet vented by the lav vent.
Try this on for size. This is a rough drawing of the drainage and vent system.
You'll have to get in out help to lay out your trench and make a material list.
As I said earlier, " One question. Are you sure you have the plumbing experience to get into a major remodel such as the one you describe? It might pay you to hire someone to lay it out and make you a material list. Then I could walk you through the installation."
Your thoughts? Tom

wesryan · Dec 29, 2005, 09:17 AM

Two quick questions??

1. Can the Lav vent to roof just be one of those studor vents?

2. The dedicated vent to roof. Can I tie this vent in before I go through the roof so I won't have to drill a hole through the roof or does it truly need to be dedicated.

To respond to your last comment. You are probably right I may hire someone I just wanted to see if I could handle this with lots of help from family and friends. The layout is great!!

Thank you very much

speedball1 · Dec 29, 2005, 12:50 PM

Hey Wes,

"Two quick questions??

1. Can the Lav vent to roof just be one of those studor vents?
Yes.

2. The dedicated vent to roof. Can I tie this vent in before I go through the roof so I won't have to drill a hole through the roof or does it truly need to be dedicated.
Dedicated means just that. Non stop from tank THROUGH roof.
The reason being that while drainage and sewer vents pull outside air in to equalize the vacume built up in the drain lines when you flush or drain, a holding tank will belche air out when you flush or discharge into the tank, but when the ejector pump kicks in and pumps the discharge up to the sewer the vent pulls in outside air to relieve the vacume in the tank.
If you revented the holding tank vent back to any if the drainage vents you would be setting up a closed cycle circulation of sewer gas in your home and that would be a health hazard for the entire family.
Happy new year! Tom

plumberbill · Nov 19, 2010, 08:17 AM

You can put a air admittence device i.e. studer vent under the lav it will vent the whole bath group

speedball1 · Nov 20, 2010, 07:41 AM

Originally Posted by ;

you can put a air admittence device ie studer vent under the lav it will vent the whole bath group

Hey Plumber Bill, (We have a "Plumber Bill" right here in Sarasota.)
That's not going to work. The diagram is laid out wrong/ There should be a dedicated pit vent to the roof. While a AAV will work as the fixture vent it will not work as the pip vent since the pit vent both pulls air in as the pit discharges and expels it out as the fixtures discharge.
First off you're responding to a 5 year old dead thread. Look in the upper left hand corner for the date and welcome to AskMeHelpDesk. Tom