Roman tub tap ? I think the piece leak is a valve;it is one solid piece...

I think the piece leak is a valve;it is one solid piece of copper near two tubes, one which is a half inch that connectsinto the incoming hot marine and then a small outgoing one that connects to the faucet and I don't know how to find a replacement sector .. I think it is a Delta but I am not sure ... the house is 10 years antiquated but where can I merely find a valve instead of replacing the entire faucet if I don't know what the create or model is ?Any websites with pics of replacement valve for Roman Tubs??
Help my neighbour is driving me crazy!?
Answers:    Remove the valve and bear it to a plumbing supply store. Home Depot and the like may enjoy what you're looking for; but you're more likely to find it at a plumber's supply. They are the one and only ones I've ever found who carry abnormal bits.