How many of you if any roll water though your hose before priming? T

I have a squeeze pump, I always have 50 feet of three inch hose when pumping a floor , but when I hook 50 feet or more of four inch hard line up before the rubber I dump a bucket of water down the end of the line to meet the primer, had good luck with that.

Nope, two buckets of quick gell.

Only if we are pumping down hill. 

Quick gell?

Well drillers quick gell bentonite. One ten dollar bag does about 20 primes.

I only use 2.5" hose.  100' or less just water in the hopper.  Over 100' I put a wad of news paper at the first clamp and water in the hopper, flip the switch when the mud hits the screen.  I have mastered the prime thank goodness.  I would also rather pump a 4" slump than a 7 or 8, less splatters.

I don't, I use about 1/8-1/4 gallon of betonite and fill the rest of the 5 gallon bucket with water. Then put my 5-4 elbow on and dump the bucket into the valve and put a sponge in the 4-3 and then fill the hopper with concrete and pump on as long as it's not a shit mix it primes everytime. I think we use cetco super gel-x, I can check to make sure that's what it's called if you're interested.

Ive had very good luck using a bag of masonry cement. Have not plugged on prime in forever. I was just trying to save a step.T

Bentonite will react with some concrete mixes and make a soft spot. I don't use it and use Primetime from Conforms or another prime aid as they are safer for concrete.

I either use water or a drilling fluid it is a polymer powder

a little shot  of water lubricates the line so when i use lime to prime down the tip and roll it back twards the pump it is less likely to hang up on a dry spot. i break the line to see if the prime has flowed through everything if not i would add some more lime. its a bit of work but it also makes it idiot proof. if you want to water prime i would walk the hose to shut off before the pack gets too tight. later

Here's a job i did this morning, 150 feet through a window and down 8 ' no problem.