Here is the ‘Porch Potty’ (Liam and) I spent the last couple of weekends making.
It came out quite well and Deb is quite impressed.
The sheet metal inside angles down from upper corner to the lower corner where I’ve installed a copper drain with small gauge hose piping attached, which leads to the terrace drain nearby.
The idea is that we simply water the box with the watering can after the dogs done her pee-business and it’ll all wash away, no mess, no smell. Lets see if it works as advertised.
I expect it to be invaluable for potty training the puppy and keeping the terrace free from accidents.