safe disposal of photo chemistry

Hi,

I was wondering about safe disposal of photo chemicals, both b&w and color. I don't have a septic system, I have the regular-type plumbing. I've been concerned about it...currently I dilute everything down before I dump it in the drain. Will this cause major problems with our plumbing in the future? Is there another way to dispose of chemicals? Should I do silver recovery before disposing them?

Any advice would be most appreciated, as I am totally in love with photography and do not want to give it up, but I have my parents' plumbing to think about.

Thanks,

Erin C.

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