Good morning,

My daughter's house has a septic system.

Single story house on a slab. All waste plumbing drains to the same main line out to the septic tank.

This morning both of her toilets were backed up to the rim, but her shower and bath tub (separate bathrooms) were fine. Bathroom sinks and kitchen sink were also fine, and drained normally.

She even took a shower (before she told me about the toilets) and the shower drained without any trouble.

I am scratching my head over this one.

Why would the toilets be backed up and nothing else seemingly affected?

Also, the septic is not due for pumping, but I told her to call them and have it pumped just to be sure - its cheap insurance.

Any thoughts would be greatly appreciated!!

thanks!