Hi All Please can you help. I have a Grundfos pump in my heating system and it appears to be leaking from the bottom connection port. This happend before a few years ago and appeared that washer had deteriated, so im presuming this one is to. In the last case even though pump working fine I had to replace pump as there are no spare washers on sale anywhere. So my question is does any one know where you can get washers from or will I need to purchase a new pump again?