I'm going to be putting a full apt in we have a septic tank can I hook toilet and water into same drain system

im going to be puting a full apt in we have a septic tank can i hook toilet and water into same drain system

Yes you can. Simply wye or combo off the main and folloe these directions.
Most bathroom groups are roughed in like this.
Toilet connects to sewer main . Lavatory connects to toilet drain and runs a vent off the top the stubout tee out the roof or revents back into a dry vent in the attic.. The toilet wet vents through the lavatory vent and the tub/shower connects to the lavatory drain and is wet vented by it. This is a normal rough in and is acceptable both by local and state codes and also The Standard Plumbing Code Book in 90 percent of the country. Check your local codes to make sure you're not in the excluded 10 percent.. The vent off the lavatory may be run out the roof or revented back into a dry vent in the attic or if you're reventing back into a fixtures dry vent you must make your connection at least 6 inches over that fixtures flood rim. Hope this helps and thank you for rating my answer. Tom

I'm going to be breaking floor up in basment I have a septic there is 2 3iinch pipes coming fr floor I'm supecting one i.e. a vent one is a drain for upstairs toilet there is also 3 copper pipes coming fr floor ii don't no were they are going floor is cemented in any clues

So do you mean you had a bath in the basement or it was roughed in earlier? If you have a vent it would eventually go up and out through the roof unless it was just roughed in under the concrete and then capped. Any chance of a picture?

Don't have any pic there is 3 copper lines coming fr cement t think they were going to install a bathroom at one time there is a ground on one copper pipe . There is also 2 3inch abs pipes one with a clean out that I'm going to move to the wall so I can install pipe fr toilet also want to put in tub and sink
This is a septic system and all ready have a bathroom and kitchen upstairs
Just not sure what this guy or grail was doing

A picture, or drawing at this time would sure help us a lot. Cheers, Tom

Ill try and get u some ty fr the help u guys or grils are life savers and I'm sure u help so many people this is one of the best sites I have seen