Vaillant aroTHERM Split Plus Heat pump without hot water tank air/water indoor unit. Heat pumps and accessories air/water & ground/water (Plumbing / Heat / Heat pumps and accessories). Principal data: pipe connection 1/2 x 1/4". Supplied under manufacturer part number 0010039572, EAN 4024074961872, HS code 8418.99, country of origin Slovakia.