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DIY septic tank riser

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22K views 20 replies 7 participants last post by  Ede Smith  
#1 ·
Dug out the septic cover and had the septic tank emptied this morning. It would be nice not to have to dig out in the future. I was looking for an alternative to spending lots of money on a plastic riser. The depth of hole is 16” and diameter of lid is 23”

I Have this old dryer drum I used for composting I was thinking about repurposing this as a form to pour concrete in and using the earth as the outer form? How thick would it have to be and would the septic ceiling support it? It has some plastic fins that could be removed but the diameter is sufficient for the lid to stay in place at 24 1/2”. Also, if this is a viable solution, would I need to add a seal underneath the pour?

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#9 ·
The 24" ones I bought were less than $40 a piece
I agree. Manufactured risers are too cheap not to use. I think I paid $60 each for mine at my rental cabin a few years ago. Reinventing the wheel without spokes seems to be counter productive.

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#12 ·
I spoke with someone who sold septic products and he said a steel one will corrode from the sewer gases and advised applying an asphalt coating on the inside.

I am however, leaning towards a commercially engineered product after much thought.
 

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#14 ·
One thing to consider is that you want the risers to be reasonably water tight to prevent surface water and shallow groundwater from leaking into the septic tank. Before the plastic risers came along people used a section of concrete well casing mortared to the tank and a well cap. That might be a bit cheaper, if you can find it, but a lot heavier to deal with.
 
#16 ·
Well yesterday I broke down and bought a tuf-tite kit from a septic company 40 minutes away from me for $200.

Kit includes:
1” Tank adapter (base)
12” riser
6” riser
1” Lid
butyl sealing rope ( no anchors are needed for this system)
hex head screws The girls at the front office grabbed them from the back after I asked for them. They are supposed to be stainless so I hope they are the right ones. Looks like I probably will still need some stainless lid screws.

This leads me with two choices as my ground height is about 15 to16” from septic tank to surface.

1) 14” total height with one riser meaning lid would be 1-2” underground.
2) 20” so 4” above ground.

Do folks that install these bury them or leave them proud or try to get them flush to the ground?

If it’s buried a few inches, what should I put on top? Looking for some landscaping ideas here as this is in my lawn.



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