Some of my hunter rotary spray heads are about 2" below ground level. I recently purchased this house and have no idea why some rotay spray heads are about 2" below ground level. I had to dig around the spray head to make some clearance for the pop up. The ones where I had to dig now look like golf course holes. Is there a way to fix this problem without digging up the entire lines? Do they make any type of extensions for the rotary spray heads?