MSPA spa inflates but slowly loses air over several hours or days without visible water leaks.

Safety first: Do not overinflate the spa to compensate for leaks; this can damage seams.

• Check valve: Apply soapy water around the inflation valve and look for bubbles. Tighten the valve insert with the supplied tool if leaking.
• Inspect for punctures: Spray soapy water over the tub surface and seams. Mark any bubbling spots and patch with an MSPA PVC repair kit.
• Account for temperature: Remember that air pressure drops when temperature falls. Some apparent "leaks" are normal pressure changes; top up air slightly as needed.
• Re‑patch if needed: If a previous patch is leaking, remove loose edges, clean the area, and apply a new, larger patch.