Pulled two toilets this week. Turns out one of them has a broken PVC flange but that isn't my current issue. Each toilet has a 90 degree street elbow directly under it and each of them has about 1/4 inch standing water at the very bottom of the elbow. Lived in this house for 25 years and haven't had any material issues with clogs. The toilets are on opposite sides of a wall and offset about 2-3 feet. After the 90 degree street elbow, one toilet has an immediate horizontal 45 and then enters a horizontal all hub double wye. After the elbow, the other toilet has about 2-3 feet of horizonal run and then takes a horizontal 45 degree turn and enters the double wye. The third inlet in the double wye (which is in the middle) is a horizontal shower/tub drain pipe which is 2" pipe until shortly before it meets up with the double wye. I don't have access to any of these pipes currently but I've seen the plumbing when my first floor ceiling was open years ago. All original plumbing from 1990.
My plan is to buy a cheap borescope to see what's going on. I guess if the water gets deeper further in, it's a partial obstruction. If the water eventually goes away, I guess I have negative slope. Am I missing something? Could the double wye be causing this problem? Any other suggestions to try before buying equipment?
My plan is to buy a cheap borescope to see what's going on. I guess if the water gets deeper further in, it's a partial obstruction. If the water eventually goes away, I guess I have negative slope. Am I missing something? Could the double wye be causing this problem? Any other suggestions to try before buying equipment?
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