Wilo-Jet HWJ

Series description

Special features/product advantages

  • Ideal for outdoor applications (hobby, garden)
  • Rust-free stainless steel prevents corrosion, even with prolonged service periods
  • 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

Design type

Self-priming water-supply unit


  • Water supply
  • Sprinkling
  • Irrigation and spraying
  • Pumping water from wells and out of low-lying tanks


  • Directly flanged motor
  • Pressure switch
  • Diaphragm pressure vessel
  • for use with single-phase motor
    • 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


HWJ 20 L 202 EM


System consisting of a pump with diaphragm pressure vessel


Wilo jet pumps

20 L

Tank size


Nominal flow rate Q in m³/h at optimum efficiency


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


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

Technical data

  • Mains connection 1~230 V, 50 Hz
  • Suction head max. 8 m
  • Inlet pressure max. 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 IP 44
  • Connection on pressure side Rp 1
  • Suction-side connection G 1


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


General overview 2018 International version

Article Number 2200591
Edition 2018
Version number 1
Page format 209.9 x 297.0 mm
Number of pages 72

PDF (11 MB)



PDF: Wilo-Jet HWJ


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