When it comes to selecting the right shower hose for your bathroom, safety and durability are often top priorities. PVC shower hoses are a popular choice due to their affordability, flexibility, and ease of installation. 
PVC Material Properties
PVC is a versatile plastic material known for its durability, resistance to chemicals, and low cost. It's widely used in various industries, including plumbing, construction, and electrical insulation. PVC pipes and hoses are particularly popular for cold water applications due to their ability to withstand corrosion and maintain structural integrity.
Safety Concerns with PVC and Hot Water
While PVC is generally safe for cold water use, its performance under hot water conditions is a different matter. Here are some key considerations:
Temperature Resistance: PVC has a relatively low heat tolerance. Prolonged exposure to hot water, especially water temperatures exceeding 60°C (140°F), can cause PVC to soften, deform, or even release harmful chemicals into the water. This not only affects the hose's structural integrity but also poses potential health risks.
Chemical Leaching: When PVC is heated, it can leach additives such as phthalates, plasticizers, and other chemicals into the water. These chemicals have been linked to various health concerns, including endocrine disruption and potential reproductive issues. While the leaching of these chemicals is more pronounced in older or poorly manufactured PVC products, it's still a valid concern for hot water applications.
Durability: PVC hoses are not as durable as some other materials when exposed to hot water. Over time, the heat can cause the hose to weaken, increasing the risk of leaks or bursts.
Alternatives to PVC for Hot Water Shower Hoses
Given the potential risks associated with PVC shower hoses in hot water applications, it's advisable to consider alternative materials. Here are a few options:
Stainless Steel: Stainless steel shower hoses are highly durable and resistant to both heat and corrosion. They are an excellent choice for hot water use, as they maintain their structural integrity even at high temperatures.
Brass: Brass hoses are another durable option that can withstand hot water without degrading. They are often plated with chrome or nickel for added corrosion resistance and aesthetic appeal.
Reinforced PVC or PVC-blend Hoses: Some manufacturers produce PVC hoses specifically designed for hot water use. These hoses often incorporate reinforcing materials or special additives to improve their heat tolerance and durability. However, it's essential to verify the manufacturer's claims and ensure the hose is suitable for your intended use.
Rubber or Silicone Hoses: Rubber and silicone hoses are flexible and can withstand high temperatures without degrading. They are often used in kitchen and bathroom fixtures where hot water is present.