Connecting copper drain pipe to cast iron stack

[Tommy2000GT]

The plumber connected the copper drain pipe to the cast iron stack. I know copper and cast iron should not be connected together without a dielectric union otherwise corrosion will result. However there is a brass fitting between the copper and cast iron pipes. I heard brass is enough to act as dielectric union. Is this true?

 

[Blain]

Brass & cast iron do run the risk of galvanic corrosion.

 

[Greenman]

You'll be dead before it becomes a problem. Let your grandchildren worry about it.

 

[paperfist]

Wow you got a treasure load of copper there!

 

[highland145]

Wow you got a treasure load of copper there!

This. Have to ask the bro, plumber, but I've never heard of a copper drain.

Cut it out, sell it, pvc replacement, profit.

 

[Greenman]

This. Have to ask the bro, plumber, but I've never heard of a copper drain.

Cut it out, sell it, pvc replacement, profit.

San Francisco, PVC not allowed.

 

[Tommy2000GT]

You'll be dead before it becomes a problem. Let your grandchildren worry about it.

I was under the impression that it takes just a couple of years to start seeing problems.

 

[Tommy2000GT]

This. Have to ask the bro, plumber, but I've never heard of a copper drain.

Cut it out, sell it, pvc replacement, profit.

It would be a shame to cut it out since it was just installed.

 

[Tommy2000GT]

San Francisco, PVC not allowed.

Would an iron pipe be more ideal or is my setup typical? It's for the waste stub coming out of the wall.

The plumber says he is a commercial plumber and says he tries to use good materials. He is even using L pipe as opposed to typical M pipe for the copper supply lines inside the walls.

 

[mizzou]

Copper waste drain? Seems like such a waste of good copper.

Also, why do you have compression wraps above and below the tee? I'm sure it works, but it just looks like a very odd combination with steel wraps, cast iron stack, and copper drain 8|

 

[calahan]

Brass & cast iron do run the risk of galvanic corrosion.

That's exactly what I thought myself

 

[Tommy2000GT]

Copper waste drain? Seems like such a waste of good copper.

Also, why do you have compression wraps above and below the tee? I'm sure it works, but it just looks like a very odd combination with steel wraps, cast iron stack, and copper drain 8|

The clamps on the tee connects to the vent pipe and waste pipe going to the main waste line.

 

[Tommy2000GT]

That's exactly what I thought myself

I agree with both of you. However when I talked to the plumber today he said he has always done it like this in commercial buildings. But I am still skeptical because I have never seen anything like this.

 

[calahan]

I agree with both of you. However when I talked to the plumber today he said he has always done it like this in commercial buildings. But I am still skeptical because I have never seen anything like this.

I hope it works without problems at least couple years

 

[DrPizza]

San Francisco, PVC not allowed.

Holy cow! Why not?! Worried about toxic fumes if a house catches on fire (which would be eclipsed by the toxic fumes from the mattresses, any vinyl, couches, pillows, tons of fabrics, clothing, etc.)

 

[paperfist]

San Francisco, PVC not allowed.

For waste lines?

Don't tell me they require cast for residential?

 

[paperfist]

This. Have to ask the bro, plumber, but I've never heard of a copper drain.

Cut it out, sell it, pvc replacement, profit.

My friend just bought an old house here in the NE. When I went into his basement I just about passed out. Copper waste lines everywhere! I said dude scrap that stuff and it'll pay for that new A/C condenser you need.

I've never seen copper strapping like what's in the OP picture though. It has to be worth some good coin!

 

[Tommy2000GT]

My friend just bought an old house here in the NE. When I went into his basement I just about passed out. Copper waste lines everywhere! I said dude scrap that stuff and it'll pay for that new A/C condenser you need.

I've never seen copper strapping like what's in the OP picture though. It has to be worth some good coin!

The copper strapping is supporting the supply lines.

 

[waffleironhead]

Holy cow! Why not?! Worried about toxic fumes if a house catches on fire (which would be eclipsed by the toxic fumes from the mattresses, any vinyl, couches, pillows, tons of fabrics, clothing, etc.)

If it is anything like the Chicago area, its more to do with an active plumbers union lobby.

 

[paperfist]

The copper strapping is supporting the supply lines.

I know, I just never seen thick copper strapping like that before. I used to rolled perforated strap.

 

[Tommy2000GT]

I know, I just never seen thick copper strapping like that before. I used to rolled perforated strap.

I think he has good intentions to try to use quality materials like the thick copper strapping and copper drain pipe. But sometimes they might not be the most ideal like the copper drain pipe.

 

[Tommy2000GT]

Now I see a galvanized preforated strapping securing the copper drain pipe to the stud. I asked the plumber about this and he says the galvanized strapping won't stretch like copper and keeps it tight. I asked him about corrosion but he doesn't seem to think it's a big deal because there shouldn't be moisture inside the wall.

 

[paperfist]

Silly question, it looks like everything is stubbed out for future connections. Seems kind of crazy to do a drain like that in copper just to cut it later.

What diameter is the copper drain anyway? Almost looks like 2"

Copper is soft, but I'd rather have copper on copper. Plus where's that pipe going on such a short run, so can't imagine there's much flex to it.

Looks like he has stainless screws going through the copper strapping too which is a corrosion problem. Also, just 1 screw holding the strap in the center?

 

[Greenman]

Would an iron pipe be more ideal or is my setup typical? It's for the waste stub coming out of the wall.

The plumber says he is a commercial plumber and says he tries to use good materials. He is even using L pipe as opposed to typical M pipe for the copper supply lines inside the walls.

What the plumber has done is fine. I've removed brass to iron fittings that were 60 years old and never leaked a drop. They were corroded in place, but would have easily lasted another 30 years.

 

[Greenman]

Copper waste drain? Seems like such a waste of good copper.

Also, why do you have compression wraps above and below the tee? I'm sure it works, but it just looks like a very odd combination with steel wraps, cast iron stack, and copper drain 8|

The cast iron is "no hub", all the connections are made with bands.