I saw a picture of a disabled toilet in Japan where they have special ostamy toilets where you stand before them and hoses to wash the bag out.
So I converted my stainless steel laundry trough to do the same.
Its all going into the same drain system as the toilets. I built a small platform to stand on to suit my bag height and have a flexible hose to wash out my bag every time. Being stainless steel it's really easy to keep clean and I do my bag changes there too.
When out and about I have to neel down in front of the toilet as I'm a man and parts of me hang into a bowl when sitting , I carry a disposable water bottle and flush the bag out every time. If you run out of water while doing this just flush the loo and fill up the bottle while it's flushing.
Sounds a bit gross but really it's all just water. Chuck the bottle in the bin after.
Before the laundry trough idea I fitted bidet type hoses to both of my home toilets, these hang beside the bowl and have trigger type nozzles, they work a treat too.
Cheers Ian.