Comments about Air Mattress Self Inflating Canadian:
Of the three I received one held air. One had a reparable pin-hole and one had a valve leak (maybe reparable).
Company said I could return but not exchange defective items. I chose to keep them and repair them.
Repairs with regular PVC pipe cement.
If you can fix this it's a great deal. Thermarest does sell a repair kit, but not for the valve.