Saniflo is working its only connected to a sink but only pumps three quaters of the water away then stops and leaves rest of water in the sink

Sounds like your float inside the unit is hung up on debris or is defective. DW

may need a backflow preventer in the waste line under the sink..it is basically a ball on a spring..designed to make the water go only one way..I am guessing the wasteline was opened up with a plumbing snake..that pump may have too much backpressure from the head line..

Hi mikevinde..
Sounds like you need to disassemble the pump and clean and oil the bearings.
Please take time to rate me

A washing machine discharges water water at a very high velocity and high capacity. This is far more waste water than the pump was designed to handle. The washer discharge must be connected to what's called an "indirect waste", that is, it must discharge into a laundry tub or sump, so that the excess can be stored until it can be taken by the pump. The specific code that governs this is in chapter 27 of the International Residential Code.

Also in the manufacturers instructions, they allow the discharge from a washing machine ,through an indirect waste. [sic] "The Sanivite is a drain pump that is ideally suitable for use in a basement apartment or anywhere in the house where additional fixtures are most wanted. It will pump waste water away from a variety of sources such as: a kitchen sink, laundry sink, washing machine ***(indirect connection)***, dishwasher, bar sink, etc."

This pump will never be able to handle the discharge directly and you need to provide a receptor to accommodate a washing machine. Is there any possibility of adding a laundry tub adjacent the washer and Sanivite pump?

Yes,

Stop using it. Sounds like the "Impeller" is going bad or broken. There are replacement parts or you may buy another ejection tank.

there is a blockage in the saniflo pump or the saniflow outlet pipework

My saniflo-plus system is about 12 years old..recently it stopped draining the toilet, etc. I pulled the cover off the pump and checked for blockage and spun the cutter blades...The motor just hums....do I need to replace the entire encased pump assembly?? Help

The float switch will be the problem.
We do not replace the switch, just change the unit as labour to strip and replace switch makes it un economical.

Does the shower or sink back up into the toilet bowel after running for a few minuits?

If not:


The bowel is clogged. Fill it with water then use a plunger

water inlet pipe blows off when toilet is flushed