My old pump was not serviced many years, Main rubber get hole. To unscrew old bolts was really difficult, need to get especial hammer - screwdriver to do this. One thing is not perfect, is that water debit is somehow not what i expected, But old valves was the same, my be it should be like this.
It's crazy how much money is being asked for this spare part - everywhere!
Basically a cheek. It's probably because the manufacturer simply ignores the metric system, so all parts are measured in inches, including the screws. If everything were metric, a simple €3.5 drain mark would give the same result...
SVB can't primarily do anything for the price. But as long as we are willing to pay so much money for a bunch of rubber....