First I had a continuous running sprinkler ( rain bird ) last month
I replaced the top half of that zone's valve (exact ) same kind eight screw model rainbird 100. $ 35.00
I'm having trouble setting the screws down all the way because of some sand in the screw hole, I washed it out and used air pressure to blow out the holes, but it still dribbles,
Now another valve head leaks a bit too?
Is there a way to run a drill throught the bottom opening the bottom to clear the sand out of the holes, enough not to ruin the threads?
To change the whole valves would require me to dig up the whole valve systems and pipes. 4 per box,