The water from my kitchen sinks drains very slowly . I have cleaned trap and know pipes are clear , so suspect an airlock The two sinks and dishwasher connect to the one fitting and the waste outlet from the trap runs horizontal for approx. 12 " then drops 12" before going through house wall where it connected to a 'T' connection . Down to main drain and up to vent with loose cap . I suspect the open part of 'T' connection was vent for the system . I ignorantly replaced the 'T' connection with a 90 elbow . Can I drill a hole in the elbow to restore the venting . If so , how do I prevent water spouting out of the hole ? Alternatively should the hole be drilled near the trap at the highest point of the pipework ? Again , how do I prevent watrr spouting out . All connections glued so difficult to replace . Would appreciate some advice .
Moved from CPUs.
admin allisolm
Moved from CPUs.
admin allisolm
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