Hand-tighten the nut clockwise onto the liner's threaded port.
Identify the two threaded connection points on the exterior of the liner. 19743 P13L nut over the pipe coming from the heater pump.
Do not use tools (like pliers); hand-tightening is sufficient to create a waterproof seal. Testing Remove the internal stopper caps. Check for any slow drips.
📍 Since "rar" was mentioned in your query, if you are looking for a digital manual/file (like a .rar archive), please ensure you are downloading from the official Bestway/Lay-Z-Spa support site to avoid malware. To provide more specific help: Are you currently fixing a leak ?
If the nut feels difficult to turn immediately, back it off and restart to avoid stripping the plastic threads.
