Blowback rigs can be very effective rigs as they help to keep the carp from spitting the bait. They are often used in conjunction with a snowman of boilies, but can be used with other baits as well. I find them most effective with any bait that is more or less neutrally buoyant, with best results when the bait is critically balanced.
Here is a quick step-by-step tutorial on how to tie this rig:
For how to tie a knotless knot click here.
There you have it! It is a straightforward rig to tie and can be done on the bank. I hope this was easy to follow and can help you catch more fish.