Thats what i have is 1.5 inch dia for the first one i built a few days ago(witch charges at a 100psi), but the golf ball does not fit i even hammered it down in there and it didn't even shoot out so...when i build my next one it is going to be 2 inch dia.

thanks for the welcome.
~roen

hey I'm new to this and i have been doing some research in to it but there is one thing i don't get about the sprinkler valve, So from what i understand you drill a hole at the top of it then attach the blow gun to it. then put the gun to gather. then when it comes to firing all you have to do is pu...