Replacement macerator

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?

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

Tim

Jeff Layman scribbled

Sure you want to touch it ?

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

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 s*it)