Because they don’t actually have the pump in stock they said 6 weeks for delivery. Obviously I can’t wait 6 weeks so I tried everywhere that “carries” these pumps no one actually had one in hand. So I went back and ordered a more expensive lower output pump they supposedly do have on hand. Problem now is a bunch of the parts I already ordered are now useless and I need to order the correct parts for this setup. UGH What a pain in the rear!