oil and rocks in galvanized pipe help!

[piped]

Wondering if anybody has seen this before?

I was getting a slow flow condition in a basement toilet. The handyman started pulling out the galvanized and found this supply line in the wall. It's oil and rocks in there and he said it smells horrible!

We are replacing this pipe and looking upstream to make sure it's clean, but baffled why there would be oil/rocks in this..

Any ideas ?

Just as background, this supply was connected to the basement toilet and trap primer ( which failed ). The rest of the fixtures in the bathroom ( shower, sink, laundy sink ) all work fine with no flow issue.

 

[frodo]

typical galvanized pipe, rust/calcium/
your house needs to be re piped from the water meter all the way

 

[Tnkrst]

Frodo is correct. I installed a backflow device last night and galvanize through the whole building. Iron ductile coming in. Discharge line kept leaking. All I could do is suggest a repipe. It’ll continue to happen. View attachment 19725View attachment 19726

 

[Diehard]

Frodo is correct. I installed a backflow device last night and galvanize through the whole building. Iron ductile coming in. Discharge line kept leaking. All I could do is suggest a repipe. It’ll continue to happen. View attachment 19725View attachment 19726

So you're saying that in your case it was coming in from the main service, ductile iron line?

I see you had to use a Reduced pressure zone backflow preventer.

 

[Tnkrst]

So you're saying that in your case it was coming in from the main service, ductile iron line?

I see you had to use a Reduced pressure zone backflow preventer.

That’s correct and the city wanted a reduced pressure backflow.

 

[Geofd]

I have run across the same thing in the buildings we take care of on our campus...the rpz ,s are loaded with debris we just pull them apart vac and scape them down {plastic scraper)change parts if needed and put them back together....bleed air out of the device or it will dump.....I think its a water quality issue some of our in some of our buildings the water even ate away at s.s fixtures in a commercial kitchen now there is an extensive filtration system on that