The EZLEVEL prevents premature piping failure as well as boiler scaling by replacing that troublesome relic, the ball-float valve. The ball-float valve maintains the level of water in the return tank. Ball-float valves are known for leaking and/or failing open. This allows fresh water to continuously leak into the return tank. This fresh water contains lots of free oxygen which combines with carbon dioxide to create carbonic acid. Carbonic acid destroys pipe work and boiler internals. In addition this continuous leakage of fresh water dilutes the boiler compound resulting in scale formation.