//Put this OnEnter
void main()
{

object oPC = GetEnteringObject();

if (!GetIsPC(oPC)) return;

int DoOnce = GetCampaignInt("water",GetTag(OBJECT_SELF),oPC);
if (DoOnce==1) return;

if (GetItemPossessedBy(oPC, "statueofwater")!= OBJECT_INVALID)
   return;

object oTarget;
object oSpawn;
oTarget = GetWaypointByTag("wp_statueofwater");

oSpawn = CreateObject(OBJECT_TYPE_ITEM, "statueofwater", GetLocation(oTarget));
    SetCampaignInt("water",GetTag(OBJECT_SELF),1,oPC);
}