Old house has lots of 3/8 water line feeding faucets. I want to replace the shutoffs under the sink but really hard to find 3/8 sweat valves. I don't want to use compression on the copper line. Can I use a reducer fitting to increase to 1/2 line then use a 1/2 sweat valve? Dont want to run all new 1/2 line up there.
Not too hard to find the product that you need without having to resort to adapter fittings. See picture source link.