Step
8 - Make your own Dumbbells - insert the pipes
Just wiggle each pipe into one mold filled with the approximate weight of concrete desired. It is good if the concrete goes up the pipe to the bolts, but must not go past the bolts.
Now you can double check the weights again and add or remove some cement as needed to ensure that:
- Each end weighs the same
- The total weight is what you want from the dumbbell