Series 21 Female Couplings

The Series 21 Type Quick Connect Female Coupling is a precision-engineered quick-release fitting designed to integrate seamlessly into water-fed window cleaning systems. Built to the widely used Series 21 (Rectus 21) standard, this female coupling connects instantly to compatible male fittings, forming a secure, leak-free joint between hose sections. Its robust metal construction provides excellent corrosion resistance and long service life under repeated connection cycles, while the internal locking mechanism ensures a tight, reliable seal every time.

Designed for both professional and DIY window cleaners, this coupling removes the need for slow, threaded connections. Push to connect, pull to release, and keep water flowing without interruption. Ideal for linking hoses, reels, and poles across demanding cleaning setups, it delivers dependable performance where consistency and speed matter most.