What’s this hose/tap?

[DavidT100]

Looks to me like it will pull down out of the clip it's in, run the pump maybe it's meant to be a simple shower/boot wash?

It’s definitely a Hop2o valve - does pull out of the clips but still can’t get anything out of it- may be a call to the converter who hopefully will help (we didn’t buy it new from them cos we’re not hedge fund managers or international diamond smugglers which I think you now need to be to afford these from new)

 

[Grim Reaper]

Is there any water in the fresh water tank to drain out?

 

[DXX]

You’d better hope it’s a drain as it it’s not fit for purpose as a filler.
Best source of information is the converter who did the work, everything else is just a guess.

 

[DavidT100]

Is there any water in the fresh water tank to drain out?

Yep plenty- at least 15l added to test

 

[DavidT100]

Well…. mystery solved - it’s a drain for the water tank, the valve was partially stuck (probably from picking up muck when driving - will put a cover over it) - now draining free! Thanks to all who responded