the dumpvalve ive got is a baileys piston type not sure if its a twin piston one r not, ive just got of the phone to woodford garage and they sell a dv26 for £69.95 so ill wack this on ebay and get oneof those.........which vacumm hose is best for the dumpvalve??..............i only paid £40 for the valve and the samco which is a bargain in my eyes , so im not bitter..lol