As my regular readers (?!) will know, recently I decided to set up the
airing cupboard as a laundry-drying cupboard by installing a
dehumidifier in there.

It only arrived this morning so it's still in its 24-hr limbo before I'm
allowed to fire it up, or apparently the compressor will explode. Or
something.

Anyway, am a bit disapppointed in the size of the water reservoir, which
looks like it will take about half a cupful of water. The machine was
advertised as a "10-litre" model which sounded plenty - however, if I'd
stopped to think about it, I'd have realised that's a couple of gallons
which is a larger volume than occupied by the dehumidifier itself. Duh.
Apparently "10-litre" means it will suck 10 litres of water per day
out of the atmosphere. Of course.

Getting to the point now... Since this model has the facility for
continuous draining, it would be nice to make use of that, wouldn't it?
Now, right next to the dehumdifier is my unvented HW cylinder,
complete with its safety valve/tundish arrangement which connects to the
exterior, across the landing, via a 22mm copper piper. So, I'm just
wondering if there is any way I'd be able to make use of this without
breaking regs or compromising the safety of the HW cylinder?

To do so, I'd have to bring the existing tundish down from about 1m high
to 30 cm off the floor (is that in itself allowed?), and add a tee into
the 22mm copper below the tundish, connected to a short vertical run
into which the 0.5" plastic drain hose from the dehumidifier would be
tucked. Diagram below.

So, would this be allowed? It would be much easier than ripping up the
landing carpet/floor to run a dedicated drain...

David




overflow from cylinder ________
| | SIDE |
| | VIEW |
x existing tundish position |________|
|
|
|
|
| drain point for
| dehumidifier
x proposed new tundish |
| |
| |
|---------------------------------
|
|
|
| common drain to exterior.