what can I do to make my rain bird impulse sprinkler rotate . It seems to hang up in one spot

You could try vinager. Thats what I use to remove/break up deposits on shower heads and faucets. Works everytime.
Vyger5 years ago
My water is alkaline and it leaves deposits on sprinklers (and everything else). So when my sprinklers start clogging up I clean the deposit's off with toilet bowl acid. You could also use Lime Away or something like that but I have found the acid to be the most effective and cheapest. Just be careful of aluminum parts because it eats that up,