I have an old cast iron tub that fills up with water and drains very slowly when the shower is on. It has an old style cleanout outside the tub as shown in these pictures:
https://imgur.com/a/1U0qm
When the cleanout is in the fully closed, normal position the tub does not drain. As soon as I open the cleanout, the water rushes out and the tub drains perfectly.
Is this an issue with a clogged vent pipe? The sink and the toilet in the bathroom seem to work perfectly and drain/fill without issue. If it is, what's the best way to fix?
Thanks for your help!
https://imgur.com/a/1U0qm
When the cleanout is in the fully closed, normal position the tub does not drain. As soon as I open the cleanout, the water rushes out and the tub drains perfectly.
Is this an issue with a clogged vent pipe? The sink and the toilet in the bathroom seem to work perfectly and drain/fill without issue. If it is, what's the best way to fix?
Thanks for your help!