Is it ok to pour a cup of bleach down shower drain?

better to use baking soda,Dawn dish soap ,white vinegar it will bubble/fizz,let sit in drain then add gallon boiling water to flush it clear also need to clear drain of all hair that is built up get needle nose pliers & actually pull hair from thre drain. you can use the bleach but this works better cutting drain sludge these work well instead of using bthe needle nose pliers https://www.amazon.com/dp/B01N1Z6IFJ/ref=sspa_dk_detail_2?psc=1&pd_rd_i=B01N1Z6IFJ&pd_rd_w=QrFWf&pf_rd_p=f0dedbe2-13c8-4136-a746-4398ed93cf0f&pd_rd_wg=VPuiJ&pf_rd_r=ZG6XBE6C2Y4SBA4K3GHJ&pd_rd_r=778d19f9-1e55-11e9-a8aa-c7ff13f25d14&smid=AG754M99Y6G6L

I would call the city and have them check the water lines. Also, if your home is new, call the builder. Sometimes, junk from bldg. materials is in the line and your builder should address this. Had a friend whose line had a piece of a 2 x 4 in it. Guess a worker didn't like the builder.

Bleach isn't good for your septic or sewer system as it kills helpful bacteria and you should limit the amount going down your drain as much as possible. Also, I've never heard of bleach helping with a slow drain.

Here are a few tips to help with the drain:

There is an inexpensive tool you can purchase, like this one, to help remove any hair that may have accumulated in the drain. You will probably need to remove the drain cover to access the drain area.

https://www.homedepot.com/p/FlexiSnake-Drain-Weasel-3-Pack-Refill-for-Drain-Cleaning-DWPRL3/203483772?cm_mmc=Shopping%7CG%7CBase%7CD26P%7C26-7_PLUMBING_REPAIR_%26_REPLAC%7CNA%7CPLA%7c71700000033850300%7c58700003919643946%7c92700031584469661&gclid=EAIaIQobChMIwuasvtSB4AIVBLbACh33EQXYEAQYBCABEgLGzvD_BwE&gclsrc=aw.ds

Then follow the steps on this Hometalk project. I would cover the drain after pouring in the 2 ingredients to keep the effect inside the drain.

https://www.hometalk.com/diy/clean/bathroom/the-natural-drain-cleaner-for-your-clogged-drain-19246737

No buy a router

Bleach is horrible vile stuff. Bad for pipes and environment. If this is a new build, your builder and the city are on the hook for this. Don't take no for an answer, there are lots of sloppy contractors out there and construction debris gets in the lines. Their job to clear them for you.

We had trouble with our washer drain plugging up for years.....always rented a snake to clean it out. One day at the rental company, we were told that after the drain was clean, we should pour bleach down the drain every six weeks or so. We did that and never had trouble again. We are on city water, our house is about 70 years old. I never tried pouring bleach down the shower, but have used it in a sink before. I am sure, if your house is new, there is probably builders debris in the pipes and the construction crew should look into it. My DIL swears by the soda/vinegar/hot water method of cleaning her sinks/tub.

Thanks for all the help! Moved to Az in August, the house was built in the late 80’s I believe.