Which water pump? Sterling Cruach Torrin 2009

size35

Hi,

Friends of ours have just bought their first caravan, and we're planning on going away together soon. However, they're not sure which submersible pump connection they ought to have for their van - they think it's a Truma of some sort; can anyone confirm
this? Even better, can anyone tell me what model of Truma submersible pump/mains connection they should get? (We won't be able to see their van before we go away, and our system is Whale, so it's not like we can share parts.

TIA!