Question about Saniflo 013/003/005 Sanibest Toilet with Grinder Series Pump in White Round

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Much louder noise from the unit than usual. The system was fitted by a plumber in an en suite. It services a power shower, wc and basin. The basin when emptied backflushes the shower, which doesn't always drain away quickly. The unit used to flush well, with acceptable sound, but now the flushing seems mimimal and a much louder, vibrational noise

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Hi,
The Sanibest has a pressure sensitive switch that activates when the water pressure inside the unit gets to a particular level. It is basically a microswitch sealed in a watertight container.

If the Sanibest has got gunked up inside it is possible that the unit is not kicking in soon enough and the water is backing up into your shower.

Another possible issue is that something has got into the Sanibest that should not be there that is impeding the flow out of the unit.

For both cases I would suggest that you empty the cistern and WC bowl after running clean water through th unit for a few miunutes (makes the job a bit less horrible!).

You could also try and use SaniFlo cleaning product and hope that it clears the potential blockage http://www.sanifloproducts.co.uk/products/Saniflo-Products-Saniflo-Descaler.html

** ENSURE THAT THE VERY FIRST THING YOU DO IS TURN OFF POWER TO UNIT **

1. Turn off the electricity to the unit (should be on a fused spur)
2. Disconnect the pipes (inlet and discharge) - you may get a bit of surplus water coming out so have some sponges and a bucket ready.
3. Disconnect the wiring and take the unit out
4. I clean my Saniflo's outside with warm bleach water ..
- Wear rubber gloves to keep germs out of any cuts you may have / get on your hands
- Put the elextrical cable in a taped up plastic food bag or similar to keep dry
- undo the 'star screws'
- Flip up the plastic retaining tabs with a flat blade screwdriver and gently ease the lid up.
- I put bleach and warm water in, leave it for a while (30 mins) and then swish it around and empty out into an outside drain etc
- If you want to use an old toothbrush to get into the areas by the float switch and under the motor it does help. I also used a hosepipe in the past which did the trick.
- Also pay attention to the inlet port and the actual pipes under your sink for gunk

put it back together, aligning the seal and plastic clips should just pop on (may need a firm push). Do up star screws and you are ready to reconnect the pipes and electrics.

I use some tissue paper to check for any leaks around the pipes just to be sure!

Another point to note is that you can insert a simple non-return valve into the pipe near the shower to stop the water coming back up; however this is not addressing the root cause.

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

Posted on Feb 02, 2010

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Posted on Jan 02, 2017

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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

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