![Plumbatube a Concrete Pier 12" Alignment Tool-fits Most 12" Diameter Tubes : Amazon.co.uk: DIY & Tools Plumbatube a Concrete Pier 12" Alignment Tool-fits Most 12" Diameter Tubes : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/A1v0+Yo3urL._AC_SL1500_.jpg)
Plumbatube a Concrete Pier 12" Alignment Tool-fits Most 12" Diameter Tubes : Amazon.co.uk: DIY & Tools
Darrells contribution, the 10" Sono Tube is put in place, white sand is poured into the void between the sonotube and the sonotube containing the concrete. Worked well.... - Fraser Valley Astronomers
![Had a retaining wall done. They used this rock to backfill. Problem is that the sono tubes became loose because it hasn't fully settled and it's a little larger rock. I'd like Had a retaining wall done. They used this rock to backfill. Problem is that the sono tubes became loose because it hasn't fully settled and it's a little larger rock. I'd like](https://preview.redd.it/x5zx962z2nd71.jpg?width=640&crop=smart&auto=webp&s=bdf148cb5208f88bc7b4c3d7db27bb1ab083edfe)