The Grundfos Amazon STN-4.0 B is a Positive & Negative head shower booster pump used to increase water pressure to a gravity fed hot water system. It's ideal for boosting water to single/multiple showers where the outlets are above or below the cold water tank.

Brand Name	Grundfos
Colour	Brass
Material	Brass
Manufacturer Model No	96788176
Wear Type	N/A
Type	Shower Pump
Certifications Met	WRAS Approved
Country of Origin	N/A
Protects From	N/A
Waterproof	IPX2
Number of Pockets	N/A
Dimensions	(L)284 x (W)225 x (H)283mm
Electrical Rating	Continuous
Cable Length	1.5m
Voltage (V)	230
Power Input (W)	790
Fuse	10A
Closed Valve Pressure (bar)	4.1
Max. Flow rate (l/min)	50
Minimum Pipe Size	22mm
Features	Low noise design - quiet induction motor and minimal turbulence pump head, Continuously rated, Supplied with 22mm Stainless steel hoses, Fitted with long-life silicon carbide seals, Twin (STN) & Single (SSN) impellers, WRAS Approved, IPX2 water ingress protection, Regenerative impeller designed to overcome air pockets, Premium brass pump head and impeller, Auto activation in Negative Head operation, Dry run protection built in