Answer: The 1'' connection fitting with bypass function is designed so that it can be installed both vertically and horizontally. The flexibility in installation allows the fitting to be adapted to different spatial conditions and installation requirements. Here are some points to consider: Space conditions: Check the available space and accessibility for maintenance work to determine the optimal installation position. Access to bypass function: Ensure that access to the bypass function remains easily accessible even after the valve has been installed to ensure easy operation. The ability to install the fitting vertically or horizontally offers a high level of flexibility for different installation environments.