Replacement macerator

[Jeff Layman]

I have to replace an old Saniflo X2 macerator. It has been used as a pump on the garage sink waste as the garage is lower than the house. The sink isn't used that much now (it used to be before we came here). A Screwfix Turboflush Macerator would do the job (/

but we have a 22mm pipe to the sewer, and according to the instruction manual it will not replace a machine installed with 22mm pipework. One of the reviews repeats this warning ("the outlet pipework should be 32mm solvent weld so dont reuse old pipework if its 3/4 overflow pipe."), but another refers to its use with 25mm alkathene pipe. Also, as it appears to actually be a Saniflo unit, and Saniflo macerators can be connected to 32 or 22mm pipe, why shouldn't this one?

Anyone connected this unit to a 22mm pipe and wished they hadn't?

[newshound]

If you don't actually need a macerator, you might be able to replace it with a cheaper submersible pump. Machine Mart have a range of float-actuated ones. Also plenty of 12 volt bilge pumps available on eBay and elsewhere. How much "solids" do you think are going down there?

[Tim+]

Seems pretty pricey. Could you adapt a lidded bucket and one of these?

Tim

[Jonno]

Jeff Layman scribbled

Sure you want to touch it ?

[Jeff Layman]

Good idea. I'll have a look at them.

[harry]

Your standard pipework in waste systems is not designed to withstand positive pressures, ie the water drains by gravity. Once you start applying positive pressure (ie by means of a pump) the pipework joints can be forced apart if they are the standard push fit. So you need glued pipe to prevent this. The smaller the pipe, the higher the pressure and the more likely to come apart. Also the pump may not be rated to run for longer periods caused by the restriction of smaller pipe. Also smaller pie is more prone to blockages (ie ground up shit)