Kitchen sink clogged with rust?

[RequiemOfDemise]

I recently left for 2 weeks to do a job. During that time, Im assuming the pipes froze.
When I returned, after a couple days the water began to run again. But came out red and left rust in the sinks, and tubs.
After letting the kitchen sink run for a while to get clean water, I noticed it wasnt draining.
Its a double sink. I tried plunging and plunging and nothing really, though the water went down some.
Are there any "safe" chemicals I can use to fix this?

[Mr_David]

Using chemicals is never a good way to clear a drain stoppage.
If they don't work then you're stuck with the harsh chemicals in the sink.
If you're not comfortable with ttaking the drain apart and cleaning it your self then call a "professional".
Look for a cleanout plug under sink or outside on a nearby wall.
Not all sinks have one though.

[SlowDrip]

I need a big sign that says "stop using chemicals on your drains" ....big enough that I can hit people with it because I am a jerk like that.

As David says, there should be a cleanout nearby. If not, go buy or rent a snake and use that instead. Chemicals cause way more problems than they solve.

[Purdie]

We moved into a rental house a month ago. We immediately noticed that our kitchen sink was very slow with draining. We eventually took the pipes apart and noticed that one was completely rusted and broken so we bought a new one, we also bought a snake to try to clean out the drain as well as draino. We spent several days trying to fix whatever it is that is clogging the sink, but now it is completely backed up and we can't use the kitchen sink at all. We are beginning to think that the clog is behind the wall. We looked in our lease and it says that the the landlord is not responsible for repairs on the house. Any suggesstions on how to fix the sink without spending tons of money? I think it should be the landlords responsibility since the sink was clogged when we moved in obviously and the previous tenants even left a bucket for draining and spackle type thing under the sink. Help we are having to wash our dishes in our bathroom sink!

[SlowDrip]

@ purdie

Did you snake the pipe itselff or did you snake down through the sink? you should remove the p-trap and snake the line directly, since apparently the trap itself is clear This gives you a couple of extra feet of snake to work with as well as being easier since you don;t have to fight through the trap at all.

The next step is determining where exactly the clog is, it may be easier to get to than you think.

-Can you determine if there are any other fixtures on the same drain line?
-Is there a fixture above the sink on the stack?
-Is any other fixture in the house clogging or backing up?