When I used to do cable TV/Broadband and telephone installs I never had trouble drawing cable though cavitys. I used a BBQ skewer, it was more rigid than a coat hanger and had a ring on one end to pull it back with.
All you had to do wash push the cable into the pointed part. I always made sure the cable had a drip loop and used a wall grommet and silicon to stop any moisture getting in the hole.
In terms of blow outs I used a 10 mm drill bit first and took a little extra care on the outside skin of bricks
All you had to do wash push the cable into the pointed part. I always made sure the cable had a drip loop and used a wall grommet and silicon to stop any moisture getting in the hole.
In terms of blow outs I used a 10 mm drill bit first and took a little extra care on the outside skin of bricks