newshound wrote:

fred wrote:

Try ebay for an 'O' ring set. You'll get a selectiob for very little
money

True but IME they normally contain "thinner" rings and often don't have
a good match for existing ones.
They normally come in integral metric sizes

I find pressure washers need sizes that are not in the selection boxes,
and they're picky to 0.1mm, too small leaks, too big refuses to connect.