I have an existing house on an existing septic system. I’m putting a guest house behind my house that will double as a “pool” house. It has 1 bedroom and 1 bath. My plan, and what I have already plumbed, is to install a 1hp ejector pump in the mechanical room and pump to the existing septic. That’s about a 100-150 ft pump going up a steady rise of about 4-5 feet.
My other option is to put in a dedicated 1 bedroom septic tank . The main problem is that on the downhill side of the guest house (where gravity would take it) it takes a bit wet so perking could be problematic.
You guys have any advice or do you think my plan on pumping to the existing system would work?
Replies
If the pump is rated for that much run and head, I'd think it would be fine. I'd give myself a wide design margin though. It's interesting, you would have 150 ft of effluent water always in the line, held in place by the check valve. I wonder if solids would somehow adhere to the pipe walls in that situation. I assume you are using the standard 2" line for this.
I would consider a valve / cleanout setup where you could flush that line out periodically. I have not data or experience that proves this is needed, it just seems like a good idea to me.
Good luck!
It would work a lot better if you have the pump push close to vertical, and then route the pipe downhill to get to where it is going (or visa versa)
there will be solids in the line, and trying to push them uphill that far is asking for trouble.
devil is in the details.
what diameter line have you buried?