I am going to be hooking up a sprinkler to my Well. The pipe that comes out of the well into my basement is 1" but it immediately necks down to 3/4" and then feeds the house. I would like to tap in before it goes down to 3/4" with a 1" connection. Is there any problem with connecting like this?

Also if I do it this way it will be before the sediment filter. Will I need to install a filter for my sprinkler system?

Thanks for your help