Yes I had the same issue and called Mike Scott Plumbing.......I had backup in both toilets and when I plunged the master bath toilet it backed up in the shower. I live in a courtyard villa so the guest bathroom is closest to the street. That also backed up although I only use it on occasion. When the plumber got here he plunged the guest bathroom toilet (I never did that) over and over till it ran thru. Checked the master bath toilet and that flushed thru also. He said I should have plunged the toilet closest to the street as he did to clear the clog. I had only been plunging the master bath as that's the one I use mostly. I hope this works for you and saves a $109 repair bill.

Thanks for all the responses. I do realize that calling a plumber is the obvious solution, but sometimes the "obvious solution" isn't the only solution. This has gone on for the past 7-8 months, but only intermittently. Everything is fine for 3-4 weeks, then I have to plunge both toilets. We only use Scotts single ply paper, since we had septic up north and prefer it. Strangely enough, the drains in the bathroom sinks still work when this happens. I usually do most of the repairs in my house, as I worked in maintenance in a power plant for 30 years, so I know how to use tools, and like to solve problems myself, if I can. Problem is, I draw the line at snaking sewer lines. I'm going to try the Green Gobbler main drain cleaner, and if the problem reoccurs I'll call a plumber. I will let everyone know the results.

Maybe work quality is slipping since Mike’s death in a car wreck. I would bring your experience to whoever runs the company now.

Probably hair. Pull out the drain switch on the side of the tub. Clean hair out. You can try draino as well. Or pay $80 for a plumber.

We had the same problem. CPM plumbing used a scope down the drain and found an obstruction in the sewer line. He snaked it out, actually did it with the scope which was weird but it worked. No more problems for three years now.
It seems the laborers who built the houses like to throw all sorts of junk down the open pipes.

We have an issue that our walk-in shower drain is not draining while showering. The water forms a puddle going out at least 12" from the drain. We can't remove the drain cover, it is caulked in - any suggestions?

Kiley and Sons Plumbing ran a camera through my waste line to check for ant blockage. I also had them service (back wash) our tankless hot water heater. They also checked the vents etc. This was all part of their annual inspection program. Great service and reasonably priced.

You might try flushing about a cup of blue dish detergent (NOT dish washing machine detergent) down the toilet. Let let it stand for a few hours then flush a second cup of detergent. It worked great for me.

We had similar problem--eventually wound up with complete blockage. Mike Scott snaked it and came back with a bunch of fine roots--incursion from the tree in the front yard near the sewer line. Now I put a couple of pounds of ROEBIC K-77 - ROOT KILLER FOR SEWER down the toilet every six months--let it sit overnight and bingo. No more problems.

Could be tree roots in the drain . Happen to a few I know.

You need to remove the drain cover. If it is caulked in, just cut away the caulk with a utility knife. It should pop right off. Clean out the drain and add some heavy duty drain cleaner.

Plumber time without question.

Disposable wipes are not disposable. Will lie there collecting grease, hair & soap scum to cause blockage. Do you use them? Time for camera.

Ohiobuckeye
 

I understand they won’t come for Free but come on $200.!

try16 OZ white vinegar and 1/4 baking soda ,
 

try 1/4 cup of baking soda followed by 16 OZ white vinegar down the drain

we've 'heard' the slope of the waste line may not be to code - iirc, 1" drop in 10'

far's 'common line' to the street, haven't heard that 1

I don't think a 1/4 cup of baking soda and vinegar is going to much to unclog a 4 inch main sewer drain line.

Outgoing sewage pipe may have belly.
 

Your main outgoing sewage pipe could have been installed incorrectly. Have plumber
video your pipe. Mine has a belly in it, roots and I must flush it out every couple of months. It would cost $5,000 to have it corrected and so must live with it. Only use Scott Toilet Paper.

It might just be a build up of hair and soap. An easy thing to try is with water pooled in the shower take plunger and gently push it down over the drain then rapidly pull it up trying to create suction to lift the gunk back through the holes in the drain. You will have to pull the hair back out with your hands when it starts to show through the drain holes. My wife's hair builds up in our drain over time and this clears it every time. I saw this on a pluming video years ago if done right it creates an enormous amount of suction.