On 3/31/2016 10:04 AM, wrote:
The seals are just flat rubber rings so should be easy to replace but I
can't find anyone selling them separately. I don't feel motivated to
make a punch and buy sheet rubber so can anyone suggest a supplier?

I would look in my box of these

http://www.screwfix.com/c/heating-pl...lumbingwashers

If you could post the OD and ID I will see if I have anything close.