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Type "D" polypropylene 1 1/4 inch female camlock (Cam & Groove) coupler to 1 1/4 inch female NPT threads
Global jump size aluminum 3 inch female camlock (Cam & Groove) coupler to 4 inch male camlock (Cam & Groove) coupler
similar to lay-flat fire hose
and scene situations with low GPM hydrants where drop tanks and hydrants would need to be used in conjunction
Knox Box FDC Lock 2 1/2" NH/NST Male Locking Cap Model:3120 (6.0 TPI x 3.250 OD) Type "D" polypropylene 1 1/4The 3110 model with 2" NH threads (7. 5 TPI x 3. 068 OD) is the most widely used configuration however, thread patterns and sizes vary by jurisdiction, so always verify the correct specifications with your local fire department before ordering. Knox FDC Locks protect fire department connections (FDCs), keeping pipes clean of debris to ensure the delivery of high pressure water flow to fire sprinkler systems. The Knox FDC Lock is available in 2 1 2"
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