While we don't warrant our products for cold weather climates we have had customers install them with great success in the past. We do however recommend you winterize any plumbing fittings installed in an area that may reach freezing temperatures.If you are fitting a shower outdoors it is recommended that it can be isolated before the water reaches the outdoor environment and that you include a way to drain all water from your outdoor plumbing to ensure it cant freeze. While copper and brass are both strong plumbing materials they aren't indestructible and freezing water can expand and cause your pipes to split or crack, destroying fittings and causing leaks once thawed. If you plan to install our fittings in a cold enviroment please consult with your installer or plumber before hand and ensure they install appropriate winiterizing systems to keep your fittings safe.