The Monument Drain Down hose is designed to lay flat when draining down a central heating system. The silicone rubber hose can be coiled for storage with hook and loop fasteners. When uncoiled the hose lays flat, unlike standard hose pipe, allowing water to flow with gravity. The hose is 14.5m long and has a hose clip to affix to the drain off cock. 12mm internal diameter and 19mm outside diameter.