How long is the hose feeding it? Use 3/8 hose and 1/4. Normally there is no reason to upsize this unless the hose is larger than 3/8 How big is the hose feeding it? I chop them off and use the right male threaded adapter and a clamp at that point.
I didn't think about it, could have used a 3/8 but had the 1/4 stuff in hand when I did it and it doesn't make any difference. You could adapt with ****** and a reducing coupling also.