Have an Intex ultra frame pool, aquired a 1 hp pump and sand filter with standard 1 1/2 fittings. Found after market 40mm to 1 1/2
' adapters on amazon. Connected right up to the pump and hoses, no modifications needed.
http://www.amazon.com/Intex-Adapter-Kits-Accessories-Connection/dp/B004GE6OQA