This is the standard industrial quick disconnect used by carpet cleaners. Foster H2B has 1/4" female pipe threads and conforms with ISO Standard 7241-1, Series B (brass). Spring loaded plug in tip keeps water from dripping out of end while you set up or wrap up your hoses.
Used on the cleaning tools for EDIC, White Magic, Hydramaster, Parker, and Butler.
Please note 1/4" pipe connection is 1/2" across.
Please note that a 1/4" QD receiver is 5/8" across on the QD side.
Compare to current or past OEM Associations:
White Magic B003
Blue Baron QCF4