When to use Grinder vs Sewage Ejector Pump? (tank, tanks, drain)

[ThomasWS]

I am building a workshop with a half bath about 75-100 feet from my main house. The workshop is on the same side of the house as the septic tank (approximately 50-75ft away from the tank inlet) but the problem is, with the grade of the property, the workshop is not high enough above the level of the septic tank to get proper gravity drainage.

I think I need to install a pump of some sort. Should it be a Grinder Pump or Sewage Ejector?

I've looked at both and while it's clear that an ejector would be lower cost, I want to install the correct pump for the job.

Also, I've read (on a Composting Toilet website) that output from a Grinder pump shouldn't be pumped into a septic tank because the solids are TOO mascerated and will flow out the drain side before settling... Any truth to this?

If I do install an ejector, where should the well/ejector be located? I don't want an above ground (AKA visible) Septic Line and think that I'd need to place the well further downgrade (or deeper into the ground) so that the well is gravity fed and has some back pressure to the septic tank.

Thanks in advance,
Tom

[gramirez2012]

When we remodeled our basement back in '98, we installed a basement bathroom. We used a basic sewage/ejector/effluent pump. The pump is located in the crawlspace, in a sump pit. We have city sewer, though, so I don't know how it would be different if using a septic tank.

Since installing it almost 13 years ago, we have not had a single problem with our setup.

[K'ledgeBldr]

Originally Posted by ThomasWS

I am building a workshop with a half bath about 75-100 feet from my main house. The workshop is on the same side of the house as the septic tank (approximately 50-75ft away from the tank inlet) but the problem is, with the grade of the property, the workshop is not high enough above the level of the septic tank to get proper gravity drainage.

I think I need to install a pump of some sort. Should it be a Grinder Pump or Sewage Ejector?

I've looked at both and while it's clear that an ejector would be lower cost, I want to install the correct pump for the job.

Also, I've read (on a Composting Toilet website) that output from a Grinder pump shouldn't be pumped into a septic tank because the solids are TOO mascerated and will flow out the drain side before settling... Any truth to this?

If I do install an ejector, where should the well/ejector be located? I don't want an above ground (AKA visible) Septic Line and think that I'd need to place the well further downgrade (or deeper into the ground) so that the well is gravity fed and has some back pressure to the septic tank.

Thanks in advance,
Tom

You can think it a thousand ways to kingdom-come. But you can't do it "legally".
Your question needs to be directed to your local department of health, or environmental services/resources (or who ever the convening authority is over septic systems.

As a general rule- Tanks have one inlet. One inlet only. Even when you have multiple tanks- one inlet, one outlet.