hey guys. k so we have been doing lots of line pours lately and looking from the fellow pumpers on how they make a prime for lets say 200 feet + of mixed steel and rubber. 

1yd of grout never fails 

ive heard some fellow pumpers say put a ball ahead of your prime or a wadded up crete bag 

Portland and water works good for me. but I always prefer grout with a little water ahead

ok thats help here is the kicker are you guys using the ball catcher port or hopper mixing as our one truck does not have this port

I mix right in hopper with the rake that comes with pump