th bailey dumpvalve has recently gone quiet on my car hardly seems to make any noise any more, i also seem to have developesd a rattle underneath my car at low speed, anyone got any ideas of what these problems could be, i don< think they are related

did you find any loss of performance when you fitted the Bailey Dump Valve?

ididn't notice any, it seems 2 be still performing ok

It may need lubricating. When I first fitted a dump to air unit it didn't work very well, after removing it and applying oil to the piston and parts that move every think was great.