Piston Seal Kit for MK1 and MK2 Hill Pumps

MK 1 and MK2 Piston Seal Kit (not for use in the 3rd Gen Pump).
A kit of 3 replacement piston seals. The classic symptom of a problem with this seal is resistance on the upstroke and tendency to recoil back downwards. The piston seal is the workhorse of the pump and it's life can be dramatically shortened by overheating and a lack of lubrication. To maximise the life of this seal please follow the advice on pumping and lubrication in our instructions.