20 Most Recent Saniflo SANIBEST Pump Macerator Grinder SFA Questions & Answers


It sounds like you may have broke a piece off the impeller vanes.This may have gotten caught in between the outer rim of the impeller and the pump housing. You will have to take the base off the pump to clean and inspect.Thank you

Saniflo SANIBEST... | Answered on Jun 20, 2011


It is possible that your pump is about done but before I condemmed it I would remove pump and wash it out .Remove intake shroud and make sure there is nothing wrapedc around pump shaft.Also make sure that the float is free. I would inspect check valve on the discharge line to make sure that it is closing completly and not just allowing contents of discharge to run back into pit and continually causing pump to run. Best of luck. Thank you

Saniflo SANIBEST... | Answered on May 17, 2011


The amount of time that the pump operates is determined by the amount of water that is drained into the unit. If the amount of water from the sink is less them the amount flushed then the pump will run accordingly.

Saniflo SANIBEST... | Answered on Mar 06, 2011


It sounds like the impeller for the grinder pump has something fowling it and you will need to pull the pump or at least clean it out.

Saniflo SANIBEST... | Answered on Mar 04, 2011


The float ball is hung up on debris and need cleaning or service. Use rubber gloves!

Saniflo SANIBEST... | Answered on Feb 11, 2011


Sounds like the level switch has debris stuck under it preventing it from switching off - disconnect the power and remove the lid. The level switch is the oval shped object next to the motor, there is a diaphragm on its underside which rises under the influence of rising water level, tripping a microswitch to start the pump. Check for free space under the diaphragm or stiffnes of the diaphragm reducing its moveability - this stiffnes or hardening of the diaphragm is often caused by abnormal liquids being poured down the drain such as paint thinners etc.

Saniflo SANIBEST... | Answered on Jan 25, 2011


Did you put an 1 1/2" vent pipe? It must be vented to the open air. Air must flow in and out of the vent pipe at all times so it can work properly. I had the same issue but after removing the cheater vent from the vent pipe it solved my problem. They do not recommend using an air admittance valve, cheater or mechanical vent on the vent pipe, as it only allows air to flow in or out.

Saniflo SANIBEST... | Answered on Jul 20, 2010


The internal float is either stuck by sediments or a faulty relay that does not work correctly
An inspection of this unit would have to be done to know

Saniflo SANIBEST... | Answered on Jun 08, 2010


Your description sounds like plumbing from before bacteria was discovered. The output from a Saniflo macerator should be sent to a foul drain or cesspit and not a rainwater drain.

Some authorities allow local rainwater runoff into foul drains but this situation is gradually being designed out.

Could be your Saniflo installation didn't meet building regulations when it was installed. The fact it has been working fine for 2 years doesn't count for anything if it doesn't.

Saniflo Plumbing | Answered on Feb 03, 2018


I experienced this exact same issue last month. I didn't think much of it, but decided to have our residential plumber come and look at it. It turned out that our water was running constantly and that it had to be turned down some. It was a very simple fix. Now, I am not sure whether or not that is your exact issue, but you might want to adjust the levels that your water runs at. There should be a knob behind your toilet that you can twist and turn to do that. However, if that doesn't work you might have to snake it to see if there is anything wrong going on in the pipes. Plumbing Mechanical Residential

Saniflo Plumbing | Answered on Jan 04, 2016


  1. SANIFLO upflush toilet - YouTube

    ? 6:14
    www.youtube.com/watch?v=-F1v6GIbWF8

    Aug 10, 2011 - Uploaded by Regis Saragosti
    Saniflo is the leader and inventor of the macerating toilet. ...Liberty Pumps Ascent II 1.28 GPF Macerating Toilet System - Install a Bathroom ...


Saniflo Plumbing | Answered on Jul 14, 2015


Sorry but they give you 8" for a reason, they did the testing etc. You might get by at 5" but that will probably just get by and limit the service life.

Saniflo Plumbing | Answered on Nov 27, 2014

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