... prevents capillary action and protects against moisture.A rubber diaphrage is provided to guard against pressure ... load:15,500NWith throw sand bush, reinforced butyl rubber house for press balance device .Specofocation1. Power: ... pump, WQ sewage pump, JET Self -Priming Jet Pump, CPM Micro Centrifugal Pump, borehole pump, QB60 Micro Vortex Pump, shredder pump, QXN submersible pump, QDX submersible pump ...