Answer to "Pump needs a new valve."I’d take the housing apart to access the hose to check for splits in the rubber or clamp failures within. That’s all I have. Good luck.
Answer to "Pump needs a new valve."I know this post is old, but I simply wrap a little teflon tape on the valve stem threads to seal the chuck. It holds the pressure great and the car tires now fill up in half the time.