Guys, Im strictly a maintenance co. and I don't deal with irrigation systems at all but I got a call today on a house with an issue I'd not seen before and thought I'd run it by you guys. Its a fairly new construction 1.5 years with an all KBG sod install by the builder. The owners had an irrigation system installed last season. They're getting a very slow green up this year, very slow except for the area immediately over the irrigation supply lines. If you stand in the yard you can clearly see the supply line grid running to about 90% of the heads. Is that typical?? My first thought was that the rest of the soil is compacted and the trenching for the supply lines loosened up the soil underneath but I just don't have enough experience with these systems to know.