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- 13 Apr 2016
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hi
I have a back to wall pan in a downstairs cloak room, soil pipe comes out horizontally into a flexible connector that goes down into floor behind the pan underneath the concealed cistern. This particular pan has been installed for about 10 years, on and off have noticed smells, but its getting more often so motivated to do something about it. Prior to that (previous owners, since house was built) it was a close-coupled.
Its a sulphurous smell, it happens mostly but not exclusively when we flush, however I am pretty sure the U bend is not being siphoned , the water level in the bottom does not drop, no gurgling etc. This wc is at the front of the house, about 5 yards from the manhole. There is no venting on this leg. Another sewer line runs from that manhole under the house to the back, where there is a internal soil stack that vents through the roof. There are two upstairs bathrooms on this stack and there are no issues with anything in those bathrooms. All water using points in the house drain nicely so we are not blocked - its just the bad gas smell thats the issue.
I've tried to get a better seal with silicone between the flexi-connector and the floor entry, on the guess that it was foul air coming back up through tiny gaps, but that made no difference. The flexi-connector is pretty tight on the back of the pan as well. Is trying to get a really good seal the way to go or something else to try?
I have a back to wall pan in a downstairs cloak room, soil pipe comes out horizontally into a flexible connector that goes down into floor behind the pan underneath the concealed cistern. This particular pan has been installed for about 10 years, on and off have noticed smells, but its getting more often so motivated to do something about it. Prior to that (previous owners, since house was built) it was a close-coupled.
Its a sulphurous smell, it happens mostly but not exclusively when we flush, however I am pretty sure the U bend is not being siphoned , the water level in the bottom does not drop, no gurgling etc. This wc is at the front of the house, about 5 yards from the manhole. There is no venting on this leg. Another sewer line runs from that manhole under the house to the back, where there is a internal soil stack that vents through the roof. There are two upstairs bathrooms on this stack and there are no issues with anything in those bathrooms. All water using points in the house drain nicely so we are not blocked - its just the bad gas smell thats the issue.
I've tried to get a better seal with silicone between the flexi-connector and the floor entry, on the guess that it was foul air coming back up through tiny gaps, but that made no difference. The flexi-connector is pretty tight on the back of the pan as well. Is trying to get a really good seal the way to go or something else to try?