Works With: Hayden BI-5731 Description:Hayden Central Vacuum Kit, 30ft Grey or Ivory, BI-3731, For high quality cleaning simply insert the hose end into the vacuum valve - the two metal prongs will plug into the female 110 volt receptacles in the inlet valve. 30-day money back guarantee. Compatible with all central vacuum systems with 1.5 inch diameter vacuum inlet valves that have two small holes - about 3/8 apart - above the main vacuum hole.
BI-5731
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Item# : SPM6125170505
Model # : BI-5731