Before we get to finishing the porch top, let’s take a step back and look at the very bottom. I still have some underground plumbing to finish so that we eventually can pour the concrete floor at the basement level.
A large part of the underground plumbing was already finished. We had removed the old grease trap with the temporary connections last year and connected the sump discharge to the sewer line. More recently, I extended the sewer line past the new back porch footing and took care of the footing drains.
The cast iron soil pipe (CISP) work that was left to do were two floor drains and their respective vents.
Yes, you read right – two floor drains! One won’t cut it and here is why: First, there is the centrally located, or general floor drain. If water spills into the back porch basement level, this floor drain should pick it up.
The second floor drain is located toward the east end and has two functions.
- It should pick up liquid from a future composting toilet if we chose to install one. There are a variety of composting toilets on the market. Some are self contained and others rely on a processing tank. Those with a processing tank may require a drain for small amounts of liquid discharge.
- It should allow me to drain and winterize the water system in the yard. We plan on an underground cistern that feeds several faucets throughout the yard with the collected rainwater. I don’t plan to install the plumbing system that connects the cistern with the faucets below the frost depth. Instead, the system has a low point at the back porch from which I can drain it, and thus winterize it.
Raising the sump
If I want to pour the concrete floor in the back porch basement level, I have to raise the sump. in other words, the sump basin rim has to be at the same elevation as the planned concrete floor.
No problem. I knew that I had to raise the sump by six inches, so I got myself two three inch concrete adjustment rings and mortared them atop of the existing sump pit.
- Connecting sump-thing
- Finalizing sump-thing
- Thinking about sump-thing
- Footing, drains and sewer
- What pipe material to use?
- DWV Part 3 – visions
- What happened to ‘Green’
- Finishing the formwork