Robert Manufacturing R209 Series Bob Brass Adapter, 3/8" NPT Male x 1/4" NPT Female Go to amazon.com Related posts The 10 best 1/4 x 3/8 inch 2022 FeatureBrass adaptorAdapt male pipe thread stems to floats having female pipe threadsNot compliant with CA Prop 65 or Safe Water Drinking Act DescriptionBrass adaptor. Adapt male pipe thread stems to floats having female pipe threads. 3/8" NPT male x 1/4" NPT female fittings.