I have a 30k gallon AGP. 27 inch hayward sand filter with 300lbs sand and 50lbs zeosand. 1 hp dual speed pump. 2 inch plumbing. My skimmer, return, and filter ports are all 1.5 inch so I put a 1.5-2 inch adapter on these ports and ran 2 inch plumbing throughout. Assume 40ft head. Will these 1.5 to 2 inch adapters have a significant reduction in flow? My filter reads 12psi after backwashing.