Aluminum 3" NH to 3" NH Double Male Storz Size_5" Rigid Storz Back flush flap is drawn

Back flush flap is drawn closed during suction operation

Know exactly how much hose you have

Test Ratings (Water Only With Expansion Ring Couplings)

This is the most common replacement plug in the US

Size and length of hose

Aluminum 3" NH to 3" NH Double Male Storz Size_5" Rigid Storz Back flush flap is drawnAluminum adapters are fabricated from seamless extruded 6061 T6 aluminum and hard coat anodized per MIL A 8625 Type III, Class 1. Threads have a blunt start Higbee cut with indicators on adjacent lugs. Part identifications are permanent and stamped prior to hardcoat. Adapters and components meet the requirements of NFPA 1963. Note 3 inch NH NST is very rare and is often confused with 2. 5 inch NH NST which is very common. If you have a fire department