[womaa]

I want to add a bathroom to my 2 story detached bldg, it has a 5 X 6' area that juts out from the main bldg. the floor is about 18 inches off the ground and is not insulated, wood construction, insulated on 3 sides, with siding. I have to go approx 29 feet to the house and under a sidewalk. I want to use a macerator toilet, and sink. My question is, the vent pipe would come out right next to the doorway into the 2nd floor. Can the vent pipe be angled and run on the outside of the bldg so it conforms to the required distance from an opening and still goes past roof line. Plus for the pipe to go into the main pipe under the house it would have to go another 20 feet. Another question, if the pipe runs underground but then enters through the block foundation of the house, can it angle upwards to meet the main pipe going out of the house to the city sewer? Trying to figure all this out before I attempt anything here in Sussex cty Delaware

[speedball1]

Now I have a question for you.

for the pipe to go into the main pipe under the house

If your discharge will drop down under the house why are you asking about a unit that will lift the discharge up. Why not let gravity do the work? Or am I missing something? Back to you, Tom

[womaa]

YOu are missing something. The bathroom would be located 29 feet from the house. The bathroom is raised about 18 inches off ground level in the detached bldg. It would come out of the bathroom, travel underground the 29 feet (at the same level. Then go through the crawl space black wall, then it would have to curve upwards to go along the joists of the floor under the house another 20 + feet to meet up with the big pipe that goes out of the house to meet up with the city sewer. So it's not like it has a steady drop off.

[speedball1]

And you want to use the pump to push the discharge out to the street? OK! Since your question concerned venting I'll stick to that.

My question is, the vent pipe would come out right next to the doorway into the 2nd floor. Can the vent pipe be angled and run on the outside of the bldg so it conforms to the required distance from an opening and still goes past roof line. Plus for the pipe to go into the main pipe under the house it would have to go another 20 feet.

Your question's mixing apples and oranges, One's about a vent and the last deals with drainage. Since I don't understand what you're trying to tell me I'll answer the vent question. A vent can be any length and have as many elbos as you wish as long as it has slope all the way back to the fixture it's venting. What you can't do with a vent is drop down and come back up to create a trap. You do realize that the pit requires a vent also and that the two can't be combined. The pit vent must be a dedicated vent.

Another question, if the pipe runs underground but then enters through the block foundation of the house, can it angle upwards to meet the main pipe going out of the house to the city sewer?

Isn't that why you wanted a pump? To force the discharge along the pipe and then angle up to tie into the main?
Have you checked out any macerator toilet and sink units What brand are you interested in?
Please keep mein the loop on this. It should be a interesting project, Good luck, Tom