I am looking to connect the 32mm wastage pipe from the sink on my balcony (that I use for gardening and cooking) to the drain at the bottom of the second photo. Would it work if I ran a flex tube down the side of the wall and secured it with brackets and zip ties or would a pipe be safer/more suitable? I have very little trade experience so would ask a handyman to do tricky things like securing brackets. Inexpensive solutions favourable. Thank you!