Type 311 Power Supply Unit£147.00 The Type 311 power supply is designed to run two Type 305 SSVI units simultaneously. Type 311 Power Supply Unit quantity Add to basket SKU: 311 Category: SSVI Apparatus Description Description Mains input (240V standard please ask for 110V option). Output sockets to take Type 305 SSVI water resistant plugs. Related products SSVI ApparatusType 305 SSVI £769.00 Add to basket SSVI ApparatusSSVI cleaning plunger £25.00 Add to basket