It is unfortunate that my original pump failed within a year after purchasing the scrubber; however, the replacement pump worked great
Big Mouth Pad Retainer
Fits Clarke Ultra Speed Pro 1500 and Viper Fang 20 / 20T, Venom Vn1500, Fang 24T, Fang 26T, Fang 28T, AS5160
Fits Nilfisk Advance VF99003A (alt # vf99003a)This part is listed as fitting the following models: