I finally found the bypass valves on my 181.
1. Prop up the mattress.
2. Remove two screws on the far left piece of plywood.
3. Raise plywood.
4. Hot water valve is right in front of you. The cold water valve is directly below it. Small hands are recommended for the cold water valve.
1. Prop up the mattress.
2. Remove two screws on the far left piece of plywood.
3. Raise plywood.
4. Hot water valve is right in front of you. The cold water valve is directly below it. Small hands are recommended for the cold water valve.