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Hi I have installed a Saniflo Water Genie 500w macerator. The pipework is 1 1/2 rising 1.8m with 4 90 elbows before it starts the descent. After that there is 8m with 4 more 90 elbows and a good fall. When it operates it seems to be pulling the water away, at least the water line drops in...

I am installing a new bathroom and am considering two options for the macerator unit... I can install a more powerful but older unused (brand new) TurboFlush T11 850 Watt. Or a newer WaterEasy (TurboFlush) 550 Watt model from Screwfix? The price difference is £100 (the newer one more...