Brass 3" Female NPT to 2 1/2" Male NPT (Hex) Male Threads_GHT National Pipe Tapered is common

National Pipe Tapered is common in plumbing and some industrial uses

or reduce a larger line

it should be the length of your pre-connect

50 foot lengths are easier to handle and offer more layout flexibility vs

2 1/2 inch is more common than 3 inch hoses

Brass 3" Female NPT to 2 1/2" Male NPT (Hex) Male Threads_GHT National Pipe Tapered is commonFemale to male adapters are used to bridge male to female hoses, pipes or valve fittings. Brass is commonly chosen for corrosion resistance, and is popular with chemical or salt water applications. Equivalent part number HA3025T WARNING: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. Do not use in connection with drinking water. Wash hands after handling. Brass Female to Male Adapter