bungie
To be honest ???
You need to cut a hole in the side of the wall looking back under the spa, or from under the floor. Get a very good torch and a clean mirror. Fill the spa with water and start looking.
There is no real way of blocking the pipe work off fully to test it any other way. ( You never 100% sure that the intakes and outlets are blocked are blocked off fully so there is no water in the pipes)
Stating the bloody obvious, DONT cut any holes in the spa bath itself, only the building.
DISCLAIMER
All advice is given with-out seeing the job, and hence all advice MUST be taken as advice with limited knowledge on the exact situation. NO responsibility can or will be taken. And yes, I am a licensed Plumber and Drainer with my own business in Brisbane Australia
