My mom has an old sink in her bathroom that was buildt in the early 1900's. The shut off valves look similar to spoke type to let water
into the sink. I would like to know if I can connect
an adapter to the exsisting shut off valves.I know that now water supply lines are generally 1/2 x 3/8.The exsisting shut off valves are threaded and measure 7/16 od. Here is a picture of the old valves. I don't know much about plumbing so I thought I could get some advice here.Thanks.
The supply lines to older sinks use to be 1/2 od now they are 3/8. They do make supply lines that would screw onto that but age of the valves I would recommend replacing shut off valves. You have what appears to be 1/2 galvanized coming out the wall so you can install 1/2 ip x 3/8 comp stop valves.