Polyoxymethylene ( POM ) is a relatively low-cost, high-strength plastic. The uses of acetal resins (name of the finished product made up of polyoxymethylenes) are particularly suitable for replacing precision metal parts, pipe fittings, parts of valves for dispensing hot and cold water. The use of these resins has advantages and disadvantages:

• Advantages: When not reinforced, and in the case of homopolymers in particular, they become very rigid plastic materials, they also have good mechanical strength and hardness, as well as dimensional stability as they absorb little humidity.
• Disadvantages: The most important limitation of use is the easy combustion, with the production of toxic fumes. Non-stabilised products are also attacked by UV rays.