I'm building a living wall where the water will drip down to a tray more or less at floor level. What's the best/simplest way of getting that run-off water to the waste under the sink?
The living wall is at the end of the run of kitchen units and so it's a straight line to the sink about 2.5m away, but I can't get behind the units to run a waste pipe - only underneath.
I've drawn a little sketch - see below.
I was thinking of a little pump in the bottom of the drip tray which pumps the run-off water into something like a washing machine standpipe just next to the living wall. I'd then route that under the units with a 40mm waste pipe and then connect it with a bit of washing machine waste pipe into the under sink trap. Intuitively it feels a little convoluted and I don't know enough about siphons to be confident in this set up.
A more direct alternative might be to pump direct from the tray to the under-sink trap, but the route would have to go up and down and up again, so I'm concerned I might get an airlock that would prevent the pump from pumping out the water from the drip tray .
I'd welcome any thoughts.
The living wall is at the end of the run of kitchen units and so it's a straight line to the sink about 2.5m away, but I can't get behind the units to run a waste pipe - only underneath.
I've drawn a little sketch - see below.
I was thinking of a little pump in the bottom of the drip tray which pumps the run-off water into something like a washing machine standpipe just next to the living wall. I'd then route that under the units with a 40mm waste pipe and then connect it with a bit of washing machine waste pipe into the under sink trap. Intuitively it feels a little convoluted and I don't know enough about siphons to be confident in this set up.
A more direct alternative might be to pump direct from the tray to the under-sink trap, but the route would have to go up and down and up again, so I'm concerned I might get an airlock that would prevent the pump from pumping out the water from the drip tray .
I'd welcome any thoughts.