Not pumping fitted saniflo according to instruction but just cannot get to pump .Has the pump to be primed?

Either non-return valve not fitted or not working.

The internal motor capacitor has failed - most common problem with these units

I have posted repair instructions here:

Saniplus repair instructions

It is a PDF

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.

The perfect solution will be to use a Sanitop, Sanicompact 48 or the Sanistar model. Visit the Saniflo website at www.saniflo.com for more detailed information.

sounds like the backflo preventer is bad letting water back down from system the backflo is the fitting is in the elbow fitting on top get a bucket when you loosen connection water from pipe will flow out then take elbow out of tank the backflow is the valve in bottom of the elbow it has a twist lock take out and clean if its cracked or any reason will not stay closed replace it

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

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.

Have you got power to the pump? .. if it is on a fused spur, check that there is power (i.e. check the mains switch board)

pumps lose prime for a few reasons...bad foot/check valve, crack in the suction line are probably the two most common.. see if there is a threaded fitting( most pros put one on the pipe some where) on the top feed of the pump. open it up and add water til the pump fills up. if the pump is outside turn the pump on before resealing the fitting, otherwise resael the fitting and open a spicket outside. depending on your water table it could take some time to prime but in normal circumstances up to 20 minsif it does not prime you may want to consider hiring a pro!!

on your out put pipe make sure you put as few turns and bends in it as you can, this will help the pump out when it's grinding and pushing it up. also you will want to use schedule 80 pvc pipe if you can get it and make sure you prime and glue every fitting well because you do not want that to leak when it's started up. it's always good to put a check valve on it as well some where close to where it enters the tank and a shut off valve, the glued pvc valves are handy because you dont have to worry about them leaking