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diplomat1
My problem seems simple but I cannot resolve it. Fast trap waste will only dispose of sufficient water if centre plastic piece (with o ring seal) is backed off i.e. loosened. With everything tightened up the waste water will not empty quickly enough and shower tray overflows. There is no problem with my waste piping, good fall 40mm pipe directly to stack. If I loosen centre piece (think it is called the trap) waste will run really fast and just how it should be - please help?