WILO HWJ – M automatic self-priming domestic waterworks

The automatic self-priming domestic waterworks with an almost maintenance-free membrane expansion tank is a premium solution designed for maximum reliability and performance. With a five-year warranty and drinking water certification, it is ideal for supplying households with cold drinking, service, and rainwater. Thanks to its high-quality construction, it offers a long service life and trouble-free operation.

Your advantages

• Ideal for outdoor applications (hobby, garden)
• Rust-free stainless steel prevents corrosion, even with prolonged service life
• Reduction of switch-on frequency and avoidance of fluid hammer, thanks to diaphragm pressure vessel with 20/50 l capacity
• Electrical and hydraulic connections already in place, quick and safe to install

Construction

• Self-priming water-supply unit

Application

• Water supply
• Sprinkling
• Irrigation and spraying
• Pumping water from wells and out of tanks lying at greater depths

Equipment/function

• Directly flanged motor
• Pressure switch
• Pressure vessel (with replaceable bag)
• Connection cable with plug
• Thermal motor protection switch

Scope of delivery

• Pump
• Pressure switch
• Pressure gauge
• Diaphragm pressure vessel (20/50 l)
• Pressure hose with steel casing and screwed connection
• Installation and operating instructions

Type key

Example:     HWJ 20 L 202 EM

H                System consisting of a pump with diaphragm pressure vessel

WJ              Wilo jet pumps

20 L            Tank size

2                Nominal flow rate Q in m³/h at optimum efficiency

03              Index for pump pressure Version 03 with higher pressure than version 02 (no indication of number of impellers!)

EM             Single-phase current, 1~230 V, 50 Hz

Technical data

• Mains connection, 1~230 V, 50 Hz
• Suction head max. 8 m
• Max. inlet pressure of 1 bar
• Start-up pressure 1.5 bar
• Variable switch-off pressure
• Fluid temperature +5 °C to +35 °C
• Max. operating pressure 6 bar
• Protection class IP44
• Connection on pressure side Rp 1
• Suction-side connection G 1

Materials

• Pump housing made of 1.4301 stainless steel
• Impeller made of 1.4301 stainless steel
• Shaft 1.4005 stainless steel
• Mechanical seal made of carbon/ceramic
• Stage chambers made of Noryl
• Diffuser/injector made of Noryl
• Seal made of NBR