Thanks. Tbh the idea of spending any real money on a gravity-defying shit-pump doesn't fill me with joy. Gonna see about demolishing the side return instead. Or maybe just a small section of it so I can pipe the poops straight down to Splinter's hideout.
I presume pumps are a thing for toilets which are below exterior waste pipe levels? A quick google says 'macerator'.
Are they hell?
Should I just excavate the side return by a matching amount so the relative height stays the same? Will that cause my house to fall over?