I had been considering it. The drain is pretty worn, the trap is a painted old cast iron one past its best too. I believe I would need an additional attachment to change it to PVC? From what I've looked up so far they aren't compatible with the metal pipe it attaches to and need to be modified. There's no way I would be able to get that out myself without risking damaging the pipe, it's pretty thoroughly rusted in.
I haven't been able to visualise how I'd run a pipe across to the sink without it making the shower entrance unnecessarily bulky (and potentially a trip hazard, I already stub my toes on the shower frame). A couple of plumbers I've spoken to about it can't picture it either, which is a bit of a problem if they're the ones that are going to be installing it.
Ideally I'd want a fixed pipe to hook up the hose next to the washer, I'm trying to get away from anything that looks makeshift. I wish I knew what was underneath that shower pan, one side of it's got a hollow when I tap on it but I don't know how far through that goes, if it goes to the other side near the sink I could potentially run it underneath the pan assuming the waterproofing isn't compromised. I would have thought it would have been easier to have just gone straight into the shower drain pipe if I was going to go underneath the pan, the original outlet attached to the downpipe for the shower waste so I'd say (excluding the shower drain getting jammed up with hair) it's built to accommodate it.
Something else I considered with running a pipe or hose across was the water would go down and then have to go up again. It would leave water pooled in the hose or pipe and considering my washer is a small one to fit in the space I don't know how the pump would handle sending the water the extra distance.
As far as solutions go I was happy enough for it to drain into the shower pan, I just didn't want the hose sitting in the pan interfering with the use of the shower, I don't shower and wash at the same time but moving the hose in and out is a pest and I'm sure one day I'm going to forget to put that hose in and end up flooding the place.
I'm thinking I'll probably leave it for now but if I come across a shower screen that will fit that section but is the little bit shorter I might see if I can swap it out, put a filler section on the bottom and run the pipe through that into the shower pan.
