Amazon.com: FireHoseDirect Aluminum 1 1/2inches NH to 1 1/2inches NH Double Female Fire Hose Adapter : Industrial & Scientific
A4 ss male/female threaded tank connector
Melnor Metal Double Female Adapter 59Z FB-HD - The Home Depot
Amazon.com : Sanpaint 2 Pack 3/4" Garden Hose Connector with Dual Swivel for Male Hose to Male Hose, Double Female : Patio, Lawn & Garden
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