Hey guys I am having some problems with my shurflo 4008 pump. I have it setup up on one 3/4 inch line about 200 feet long and about 30-40 taps. The problem is I am only getting 2 inches of vacuum now. I have walked the line 10 times and hear no leaks and see no leaks on the laterals. I have seen many posts where people have many more taps on there shurflo's. I'm wondering if anyone has any info on their shurflo systems and if any one else has had similar problems.