u/Electrical_Pay_3046

So incoming water was re-plumbed when we remodeled. The returns were mostly done. When taking a shower in the master there is a high pitched noise coming from the closest hall bath. Chat said it was the toilet. I’m worried it’s something to do with the return and have no clue how to make it stop. If I flush the toilet in the hall bath. It stops, but comes back the next time the master shower is on. I already snaked the drain on the roof. Any ideas?

So incoming water was re-plumbed when we remodeled. The returns were mostly done. When taking a shower in the master there is a high pitched noise coming from the closest hall bath. Chat said it was the toilet. I’m worried it’s something to do with the return and have no clue how to make it stop. If I flush the toilet in the guest bath. It stops, but comes back the next time the master shower is on. Any ideas?