Avoiding A Flood In An Upstairs Laundry Room

That drawing shows "1 1/2" or 2" drainline" for the standpipe! This is not how to keep your upper floor laundry room "safe!" The code was changed NATIONWIDE nearly 30 years ago to a minimum of 2" for a laundry standpipes and its drain lines because the new washers made since the 1980s pump water out nearly 3x faster. In the name of preventing floods you are showing something that certain to flood! Even the mere 5 gallons of a frontloader pump out in 22 seconds and overwhelm that 1.5 pipe!

Can the washing maching trays still be used with the newer washing maching pedestals without losing the use use of the pull out drawer in the pedestal?