Home Repair Question About Plumbing Leaks

I just had my bathtub faucet and toilet shut-off valve replaced by a plumber. Both were leaking. Everything that I read on the web said that the leaks were most likely due to washers that were worn and had to be replaced. But, the plumber said he had to replace the whole piece because he couldn't access the washers, he said they were designed to be replaced, you have to replace the whole thing.

So, he went through a wall to access the unit connected to the pipes that control the shower and bathtub. I wish I knew the name of this piece, I think he called it a regulator, but I'm not sure. He had to cut out the old one and solder in a new one. For the toilet shut-off value he also had to remove the old one and put in a new one.

Anyone have a similar experience like this, or has anyone ever heard of this type of repair? I am just curious, its after the fact and the leaks are gone. I am wondering if there was an easier way to stop the leaks.

TIA!

 

I haven't had to replace any valves in my house yet, but it doesn't surprise me that the builders used low quality parts that must be replaced instead of repaired. Home buyers look for quality in kitchen cabinets, countertops, molding, etc, they don't look at behind-the-scenes plumbing parts, so builders skimp there to increase profits.