Bought a second hand upholstery tool and it was leaking water constantly, and the plunger popped out when pump switched on. Tried new o ring but still same. Was doing a few suites so swapped out the inners of my stail tool, and tried in the upholstery tool. No prizes for guessing what happpend next........upholstery tool still the same and, now stair tool has a big drip. Both are "solutions" tools but they don`t sell spares. Anyone know whereI can buy spares. Also at the end of the plunger, there is no "mushroom" shape to hold the plunger in the valve. Anyone had any problems with these in the past.