Good evening all, I received the new washer kit today for my stove. The majority of the bits were self explanatory, one thing I wasn’t sure about was a washer for the underside of the non return valve. There wasn’t one fitted to the underside when I stripped it, a black washer in the kit appeared to fit, however, once fitted there appeared to be quite a bit of ‘squasage’ before it nipped up. It fired up great and held pressure. Should it have a seal in there or could the seal which appeared to fit be for another similar model of stove? Also, how many pumps is the recommended normally? Many thanks in advance, Gino.