Thinking about installing basement Saniflo toilet

Sounds like a drain restriction. I would snake or pull the draind apart trying to find the problem

good luck

Usually Saniflo requires 8" or 9" from top of p-trap to floor level, not from top of shower base to floor level. If the base is raised 8" then you will have enough room to fit a p-trap without cutting the concrete, if you had cut the floor to fit the p-trap then the base is not raised high enough to maintain the water pressure inside to engage the unit.

I would suggest that you call technical support at Saniflo.

is it pumping against gravity? if so there is a non-return flap in the outlet spigot could be stuck or worn.

Thanks for the clarification - This rules out power supply to the unit, motors/pump and points more towards why the water would be pumped from the WC flush and not the basins ...

1. The Saniflo range of macerators have a pressure switch that engages when the water pressure inside the unit activates a microswitch that is encased in a waterproof container. It is possible that the water pressure from the shower and basins is not great enough to activate the internal switch.

So, I would propose two checks

a) If the unit previously worked for the shower and basins something has changed and it is most likely to be gunk inside the unit causing the switch to be less sensitive and only activate on the high pressure that the WC would provide. The fix would be to open up the unit and clean it - please let me know if you need info on how to do this

b) If this is a new install and the shower and basins never worked, you should check the fall in the pipework into the Saniflo is sufficient (should be 1 in 70 from memory - full install instructions are available from the Saniflo website)

c) It could be that if the unit has been in for a long time with a large number of operations that the microswitch is starting to fail and is not as sensitive as it once was (quite unlikely) - but always a possibility!

Replacement microswitches are freely available online and you should also be able to get the exact match spares from Saniflo

If this helps please leave feedback - if not please let me know and I'll try and help some more!

Good Luck :)

Hi,

The inlet pipeworks for a shower to Saniflo would normally be 2" / 52mm polypipe as per the diagram (different saniflo unit type, but they are all the same)





If this helps please leave feedback, if not - let me know and I'll try and help some more!

is your saniplus connected to a shower or hand basin. if so - some water could be getting into the saniplus while you are on it and causing the unit to operate while you are "on the bowl". dripping taps / valves or a "leaky" toilet cistern are the most likely sources.

If you mean that it self activates then the non-return valve is at fault by the sound of what you say

sounds like you need septic tank pumped out. or there is a clog in main line if city sewer. hope this helps. duane.

The outlet is blocked , get an engineer in to fix it pronto