The LDH supply line is used for filling. How many connections are required?

• A. Two connections are required
• B. One connection is enough
• C. A single LDH line is not recommended
• D. Three connections are required

Answer: (B)

Filling with an LDH line is a straightforward, single-path process. The LDH supply line provides a direct conduit from a pressurized water source to the MWS fill port, so once the line is attached at the source and the fill valve on the MWS is opened, water flows through that one connection into the tank. A check valve prevents backflow, so there’s no need for a second separate connection to maintain flow. Adding more connections would complicate the setup, increase the chance of leaks, and offer no real gain in filling speed or reliability. Therefore, one connection is all that’s required for the fill.