Hi, This is my first time on this forum so please forgive any mistakes. I have just installed a sanisplit 3 which will be used to pump kitchen waste around 5 metres vertically into my loft then over to my downpipe. I have tested it using clean water from the sink and the problem is once the water is pumped up the vertical pipe the pump starts up every 2 minutes or so because the water has run back. If I switch the sanisplit off water flows back into the sink. The pipework is 40mm as recommended by the sanisplit technical advisor. I have found 40mm non retrurn valves and think this might work, but has anyone got any advice or tips for me?
Thanks.
Thanks.
