A line of 'water tubes'. Water tubes are fiberglass (or glass) tubes that are filled with water. The water acts as a thermal mass to help moderate temperature swings within the house. The copper cap at the top allows access to the water for maintenance for the water and to a low voltage LED light. The bottom is a tiled area that has an internal drain incase there is a leak and for draining the system. At night, the LED lights illuminate the tubes for the coolest 'night light' ever! Kipnis Architecture + Planning