Bought a sand filter system for an Intex pool. Could not figure out how to attach the hoses. Called them and they were very helpful. They said I needed an adapter to to convert the connection. I got pretty upset and told them they should have said something before I left the store. He reminded me about the free chlorine so it was not a total waste of time next day. They took the time to explain how to attach the fittings. I left happy.