Domes for storage tanks

Certain brands of PVC end caps work great. Some are squared off, but others are dome-shaped.

Plastruct offers dished domes in various materials and diameters.  I believe the smallest diameter is 2", and the largest is 6".  I know that they have both acrylic and styrene versions, at a minimum.

Jim

Thank you

Here's a water tower I haven't gotten around to building yet:

Not a dome, but…  These are caps of cashew jars.  They fit perfectly on Clorox wipes containers.

Take thin plastic or heavy paper, cut out a circle larger than your tube, cut a straight line to the center of the circle. Overlap the 2 cuts until you get the desired height you want. Glue the  overlap. I glued on strip polystyrene as ribs. The small water tower is a toilet paper roll with Japanese toothpicks glued on the outside and heavy thread for the bands.  The large tower is made with 2 CD's, top and bottom with thin plastic wrapped around them to give you a perfect tube, The rest of the structure is polystyrene. The two milk tanks are 1 1/2" plastic tubing with precision board glued to each end and sanded to the shape I wanted.

Thank you all for the great suggestions...I am constructing a dairy factory and will use The methods you all described.

Rick,

I use tank heads made by Plastruct. They cost a little more but they are very accurate and achieve an excellent result.

Rick:

Ditto what Alan said.
Joe