Hello Everyone,
I've recently noticed a small wet patch on my decking. Here the wider picture:
The two red circles are toilet waste branches, the yellow circle is a shower waste. The green circle on the decking is my wet spot and the green circle at the top is where the newer PVC connects to the old cast iron pipe that just vents upwards at roof level.
Some additional closeup:
My guess is, it's from the part where the new pvc connects to the old cast iron. It's not a lot of water dripping out (a few drops per hour) and the water is clear and odourless, which makes sense as I think the leak is above any areas that feed any drain/foul water into the svp. The cast iron pipe, the wall and the guttering at roof level looked pretty dry to me, but access issues prevented me from verifying.
What I am wondering is that on that day I believe it had not rained at all (maybe early hours before getting up..). My guess would have been that rainwater entered the top of the SVP at roof level (svp is uncovered) and just runs down inside the pipe. But if it still leaked hours after the rain has stopped, there must be a blockage with buildup of rain water above the first toilet waste? Everything drains perfectly well though...
Anyone got any ideas? Should I try to tighten the flexible connector between the old and the new pipe? I am afraid it might crack the old cast iron pipe, making any leak worse?
I've recently noticed a small wet patch on my decking. Here the wider picture:
The two red circles are toilet waste branches, the yellow circle is a shower waste. The green circle on the decking is my wet spot and the green circle at the top is where the newer PVC connects to the old cast iron pipe that just vents upwards at roof level.
Some additional closeup:
My guess is, it's from the part where the new pvc connects to the old cast iron. It's not a lot of water dripping out (a few drops per hour) and the water is clear and odourless, which makes sense as I think the leak is above any areas that feed any drain/foul water into the svp. The cast iron pipe, the wall and the guttering at roof level looked pretty dry to me, but access issues prevented me from verifying.
What I am wondering is that on that day I believe it had not rained at all (maybe early hours before getting up..). My guess would have been that rainwater entered the top of the SVP at roof level (svp is uncovered) and just runs down inside the pipe. But if it still leaked hours after the rain has stopped, there must be a blockage with buildup of rain water above the first toilet waste? Everything drains perfectly well though...
Anyone got any ideas? Should I try to tighten the flexible connector between the old and the new pipe? I am afraid it might crack the old cast iron pipe, making any leak worse?
