Used at high points of piping system, on top of cooling coils etc. Supplied complete with check valve, which eliminates the need for a separate isolation valve. Features exclusive flare connection at outlet, from which a drip pipe can be led directly to the nearest drain. Leakproof solid polypropylene float. All materials of construction are non-corroding. Full brass body offers greater durability than plastic. Each unit is individually pressure tested before dispatch.