Many of the commonly used foam concentrates are corrosive to carbon steel, and it is important to ensure proper flushing with fresh water after each use. Proper drainage in foam equipment or fixed systems is therefore, recommended. Bronze or Stainless steel (SS304/ SS316) is therefore, normally preferred for foam equipment.
Parts requiring replacement are usually rubber washers/ rings. When replacing them, remember to use original washers/ rings. If metal parts/ components are required to be replaced, use original spares, as material properties are important for foam equipment. Equipment may be painted externally once in 2/3 years depending upon atmospheric conditions – do not paint parts which are not originally painted.