![plumbing - What is this grit/sand like build up on the piping under my bathroom sink? - Home Improvement Stack Exchange plumbing - What is this grit/sand like build up on the piping under my bathroom sink? - Home Improvement Stack Exchange](https://i.stack.imgur.com/Oe2FV.jpg)
plumbing - What is this grit/sand like build up on the piping under my bathroom sink? - Home Improvement Stack Exchange
![Mud/dirt coming up through bathtub. Bubbling gurgling sound also in toilet/ sink. Only in this guest bathroom, nowhere else in the house. Any suggestions on what could be causing this? : r/Plumbing Mud/dirt coming up through bathtub. Bubbling gurgling sound also in toilet/ sink. Only in this guest bathroom, nowhere else in the house. Any suggestions on what could be causing this? : r/Plumbing](https://preview.redd.it/0kp8bui8xc891.jpg?width=640&crop=smart&auto=webp&s=1d5c5df8df298171785855e4035c4dc499c11e41)
Mud/dirt coming up through bathtub. Bubbling gurgling sound also in toilet/ sink. Only in this guest bathroom, nowhere else in the house. Any suggestions on what could be causing this? : r/Plumbing
![Nasty blocked drains caused by sand in the interceptor #blockeddrains #sewage #drainunblocking - YouTube Nasty blocked drains caused by sand in the interceptor #blockeddrains #sewage #drainunblocking - YouTube](https://i.ytimg.com/vi/tCiGLnvm05w/hq720.jpg?sqp=-oaymwE7CK4FEIIDSFryq4qpAy0IARUAAAAAGAElAADIQj0AgKJD8AEB-AH-CYAC0AWKAgwIABABGGEgYShhMA8=&rs=AOn4CLAP3jr51FU0LG-3D6Y8h9BqyQxcUw)