Originally Posted by Fireguy5674
I had a similiar problem years ago. When I took down the 1/2" galvanized line it was so full of corrosion and crap I was amazed any water got through it. I could not see a hole. A fifty year old galvanized hot water pipe is most likely your issue. If you try snaking it some way you could end up with a water leak in the wall as well. Good luck.
I fear that you are right - that pipe is old enough. Snaking or a chemical treatment would be almost as difficult to administer - and as the other post suggests might cause a leak.
This shower is on the second floor in the middle of the house so a leak is highly undesirable (as if they ever were desirable...).
This weekend is a long one and I guess I'll be doing some demo and see what I got. The plumbing seems fairly straight forward (I've done more complicated projects with good results). But I've never built / rebuilt a shower. I might not need to rip it out fix the plumbing but I will have to rip a hole big enough to get to the pipes.
I will take photos - I might post them if it's not a total disaster