15774.005 FOOT VALVE FOOTVALVE NISSAN UD CKB450 CWB450 CWB455 45101-01Z10 45101-00Z63 45101-00Z09 45101-00Z09-BFOOT VALVE FOOTVALVE NISSAN UD CKB450 CWB450 CWB455 45101 01Z10 45101 00Z63 45101 00Z09 45101 00Z09 B EVEN WHEN YOU FIT A BRAND NEW VALVE , THERE IS ALWAYS THE CHANCE THAT IT LEAK WITHIN A WEEK , A MONTH OR A YEAR , AS TRUCKS AIR LINES GET OLDER THE CHANCE OF SCALE AND RUBBISH IN THE BRAKE PIPES INCREASES AND INCREASES A LOT WHEN THERE IS MOISTURE IN THE SYSTEM, SO, OTHER THAN REPLACEING "ALL" THE BRAKE PIPES THERE IS NOT A LOT YOU CAN DO. HOWEVER ,