Diaphragm - Gusher Urchin Hand Pump

Diaphragm (nitrile) for Whale® Gusher Urchin hand-operated pump for flushing portable toilets. 133mm outer diameter, 29mm deep. Central hole. Part 733.25.

The Gusher Urchin handpump has a black body and a light blue clamping ring. Nitrile rubber material gives better resistance to chemical toilet additives. 

The budget diaphragm also uses nitrile rubber and is cross-compatible with the Gusher Urchin handpump and the PPE Budget Handpump.