All of the drain lines from the top floor should feed into the main line through gravity and bottom floor section enters into a pump chamber, reaches a certain level then activates the pump and then releases into the main line as well.

If you are in an area where you know a complete replacement with a gravity septic system will be fine you can estimate that. our area and parts of MA a newer higher cost pump system can be required for wetlands areas and if you have an old cesspool replacement with septic is required.

If brushing, grab the data sheet from SW or online and it will tell you how to thin/retard the paint to extend the dry times and thickness to help with gravity evening it out before fully drying.  

It is rather a simple system that involves a holding tank and a drain field.Sometimes there may be a pump involved if it has to run up hill but most systems are designed to work with gravity.  

I have a gravity feed 20oz spray gun was going to use If possible.

I feel it is my obligation to be able to protect my family or even myself as I am their primary source of support.My father taught me to escort a woman to her car if it is dark, and see they have doors locked if you must leave before they do.I do occasionally get a person who threatens me, but it is pretty rare, the last one was a loudmouthed 16 year old who had threatened to kill several folks and tried the same on me when I got him sent to a boys school, he was at least 4 or 5 inches taller than me and 60 pounds heavier, I told him there were 2 things stopping him fear and gravity, which one was it?

After Ron left I explained to the guy what the real difference is, which is the drain version has a sweep that makes it possible to snake, and the inside diameter of the drain fitting guarantees a smooth integral bore for gravity draining when connected.A day or so later I was at the same Home Depot looking for a 20A double pole switch in the electrical section. 

Septic, gravity fed is the cheapest but some counties no longer allow them.

East Franklinton is absolutely blowing up and has tons of future development planned (especially with Gravity).

i absolutely believe that there are certain principles in life that are set in motion, even before we were all born. principles such as gravity- no one has to do anything to make or even assist it in working. i think that giving and receiving or sowing and reaping are principles that work just the same. you must sow seeds before you can gather a harvest.