First and foremost, please try to tighten any loose parts and check that the cable adapter where the shower head connects, is securely fitted (just in case this has come loose somehow). If something has come loose, you may hear a slight hissing sound after pumping.  Please listen out for this noise.  If heard, you will need to tighten all the parts and it should work as expected. If the above tightening of parts doesn’t do the trick, there could be a couple of things going on here… The safety pressure valve may have popped open – please check it is not broken The tube inside the tank may have come off the fitting – please see trouble shooting Q6 below The o-ring on the pump itself could have moved/dislodged or the seal at the bottom of the pump may have come off – please see trouble shooting Q11 below