Need help filing personal injury claim in CA

As I am licensed in Florida and Vermont, I cannot give you specific advice as to California state law. However, generally, in the circumstance you describe, both the landlord and the plumber may be responsible and liable for your injuries.

If you have not done so already and it is still possible, you should take photographs of the scene. You also should take photographs of any bruises or other injuries you sustained.

I respectfully recommend that you contact a competent personal injury attorney in your area to see whether or not the attorney is in a position to take on your case. If an attorney is willing to represent you, their office will make contact with the insurance companies and isolate you from any possible contact by the insurance carriers. As mentioned by some of the other attorneys above, under no circumstances should you consent to give a statement to the adverse insurance carrier nor should they be given access to your medical records without first clearing it with your attorney.

With this type of situation, it is likely that the landlord will claim that he is not responsible because it was the negligence of an "independent contractor" (the plumber) who caused your injuries. Your attorney will know how to deal with this defense.