Sewage pump question

[73 Mustang Bill]

I'm getting ready to install the final piece of the plumbing to get a toilet in My Garage. I had the garage built two years ago, and it is permitted for a bathrom (sink, toilet, and shower). The piping is buried in the concrete, and stubbed outside the garage a few inches below the ground. Dedicated electrical line is in place with a GFCI outlet. I need to put in a grinder pump and basin, as well as about 175 feet of piping to wrap around the house to connect it to the house septic system. I'm on a lake, so I don't want to take any short cuts here, so no "redneck septic system".

My new well and grinder pump are at about the same elevation as the septic system, although it might drop a foot or so as it wraps around the house. It just has a long way to run.

A plumbing company that I talked to wanted to put in a 30 gal well, pump, and 2 inch pipe, to the tune of $1500. I was looking at a kit from Homer (http://www.homedepot.com/h_d1/N-5yc...=10053&langId=-1&keyword=sewage&storeId=10051) for $339 which looks like it will do the job. (I think it's a 30 gal well, and 11/32 hp pump for up to 2 inch solids) It also includes the check valve. 180' of 2 inch pipe is $111, for total

I'm guesing it has to be 2 inch pipe, schedule 40 PVC, buried 18 inches deep. It doesn't cross the house water line, only the sprinkler lines, and they aren't that deep, so the sewage line would be below them. I don't know exactly where the sprinkler lines are, so I might dig most or all of it by hand (or hire a kid to do it). A pain in the **** (and back, but easier than repairing lots of sprinkler lines.

Does this all sound okay? Will I run into any problems pumping this far horizontally without any (or much) elevation change?

 

[Bronson]

You can locate the sprinkler lines by dousing with 2 coat hanger wire, look on YouTube. That way, You only have to dig a few feet by hand, rest with trencher. I learned how when I was 8, My Granpa taught Me. I dont know how it works but it does, I have located lots of lines for friends, plastic, steel, etc.

 

[Randy in Maine]

Suggestion....

If you are installing a sewage grinder pump, they are usually installed with dual setic tanks in series to allow the suspended soilds in the wastewater to settle out before it plugs up the expensive leach field.

If you don't do that, at least install a Zabel tank filter to give you more life out of the leach field. About $100 well spent.

 

[73 Mustang Bill]

Suggestion....

If you are installing a sewage grinder pump, they are usually installed with dual setic tanks in series to allow the suspended soilds in the wastewater to settle out before it plugs up the expensive leach field.

If you don't do that, at least install a Zabel tank filter to give you more life out of the leach field. About $100 well spent.

I'm pumping this into my household septic tank, which is the two tanks before pumping into the leech field.... With the 30 gal tank for the detached garage, it will actually have three tanks.

 

[Donald Cook]

175' sounds like alot for 1/2 hp pump, I'd ck to see if it'll handle that.

 

[rasit]

Actually the specifications rate it at .33hp but is capable of 2250gal/hr at 10' head. Since the septic is level or 1' lower the pump should not have any problem pushing that distance. The concern might be that when the pump shuts off and the check valve closes, the liquid running down the pipe will not have any air behind it and may become vacum locked. Kind of like if you put your finger over the end of a straw and pull it out of a glass of water. The water will stay in the straw until you release your finger, allowing it to flow. This could be overcome by installing a vacum release valve or possibly installing 3" gravity discharge pipe at 1/4" per foot slope if the elevation change allows it. just my 2cents......

 

[jlckmj]

It would be much easier to rent a trencher for a project like that, then repair the sprinkler line afterword.

Just think how much time and energy you would save vs. hand digging. It may take you 10-15 minutes to repair a chewed up sprinkler line, but it will save you hours and hours of hard work digging.
Jim

 

[kbs2244]

Is your house on a basement.
So you can get to the waste pipes?
Then, maybe, you can go through the basement wall and tie into the system in the basement instead of going all the way around the house.

 

[73 Mustang Bill]

Is your house on a basement.
So you can get to the waste pipes?
Then, maybe, you can go through the basement wall and tie into the system in the basement instead of going all the way around the house.

Nope. No basements in Florida. I'm on a slab, and no getting to the house plumbing