The Monument Drain Down Hose is designed to lay flat when draining down a central heating system. Unlike standard hose pipe, when uncoiled the hose lays flat, allowing water to flow with gravity. Complete with a hose clip to affix to the drain off cock. The silicone rubber hose can be coiled neatly with hook & loop fasteners for storing/transporting. Specification Length 15m Internal diameter 12mm Outside diameter 19mm