I PRIVIOUSLY POSTED A MESSAGE OF AN AIR IN THE PIPES PROBLEM. I HAVE NOW FOUND OUT THAT THIS IS A VENT PROBLEM. HOWEVER I HAVE NO VENT PIPE GOING ANYWHERE. I AM ASSUMING THAT THE DRAINS ARE USED AS VENTS. WHEN I REMOVE A TRAP CAP THE TOILET FLUSHES GREAT BUT WHEN THE CAP IS REPLACED IT GOES BACK TO THE NO FLUSH MODE. ALL DRAINS CONTINUE TO DRAIN PROPERLY IN EITHER CONDITION. IS THIS A POSSIBILITY AND WHY WOULD IT BE ACTING UP NOW. I HAVE CLEARD ALL DRAINS INCLUDING MAIN AND THE TOILET WILL NOT FLUSH IF THE TRAP CAP IS ON. IS THERE SOMETHING ELSE I AM MISSING. PLEASE HELP I AM GETTING TIRED OF CAPPING AND UNCAPPING