HiFlo Valves
Supplement your rainwater tank during dry weather spells
with a reliable Restricted Flow Rain Relief Valve


Hansen Sloflo Brochure
(Adobe Acrobat PDF)

HRRSF1520 SLOFLO VALVE With Small Adaptors Long Tail Male 15mm & 20mm
(1/2", 3/4")
Supplied with: Complete Valve Body, Weighted Float, 2.5 metre Cord and 15mm & 20mm Long Tail Adaptors.
Max Pressure @ 20°C = 12 Bar.   Metric Sizes BSPT (DN).   Imperial Sizes BSPT.
  • Maintains a minimum water level in rainwater tanks
  • Delivers consistent 2.0 l/min
  • Suitable for high/low pressures (0.2 Bar – 12 Bar)
  • Patent pending “self cleaning pilot” for use in clean/dirty water conditions
  • Soft open and close action preventing valve bounce and water hammer
  • Lock off plunger allows the valve to be manually locked to the off position
  • Strong compact design
  • Manufactured from strong, non corrosive UV stabilised materials
The Rain Relief Floats on this website are patent pending.
The Rain Relief Valves on this website are protected by NZ registered design application 422627 and Australian registered design application 201710480.
Hansen Rain Relief Valves are rigorously hand tested.