"
If all else fails, they sell plastic collector boxes with built in pumps,
that would do what you want. Essentially an above-the-floor sump pit. I've
been planning to buy one for my basement to make the abandoned slop sink
usable, and reduce the distance my washer has to pump uphill. (Floor
drains and old washer standpipe to graywater drywell have failed, and
would cost a fortune to fix. Washer is jammed into the collector for the
septic tank, along with the drain lines for furnace and water softener.)

--
aem sends...

I googled 'plastic collector boxes with built in pumps", but nothing came
up..
Do you know what they are called, or where they can be bought ?