A lightweight, heat-resistant, large diameter supply hose that delivers superior flow during fireground operations.

Ozone and chemical resistant, the nitrile/PVC through-the-weave design allows the hose to expand under pressure — decreasing friction loss and increasing water flow.

The thin rib rubber outer cover offers increased resistance to impact, punctures, and abrasion. Reliable, maintenance-free, and no drying required, make this the ideal supply hose for municipal and industrial fire departments. NFPA compliant and UL Listed*.




  • Lightweight, large diameter with superior flow capability
  • Raised thin rib construction resists cuts, punctures, impact, and abrasion
  • Through-the-weave design for increased durability
  • Heat, chemical, and ozone resistant
  • *10-year manufacturer’s warranty


Diameter Part No. Service Test Proof Test Burst Test Bowl Size Weight Uncoupled
**4" RC40-500 250 psi 500 psi 750 psi 4¼" 0.74 lbs/ft
**5" RC50-450 225 psi 450 psi 675 psi 5¼" 0.93 lbs/ft
6" RC60-450 225 psi 450 psi 675 psi 6¼" 1.35 lbs/ft

*UL Listed to 300 psi | **UL Listed to 200 psi

  • Pro-Flow is made from 100% high tenacity synthetic polyester yarn, circularly woven and completely protected by a through-the-weave extruded PVC/Nitrile rubber, forming a single homogeneous construction without the use of glues or adhesives of any type.
  • Pro-Flow is guaranteed to withstand 10,000 cycles on the Taber Abrasion Machine (H-22 Wheel: 0.5 kg) without exposing the liner.
  • Pro-Flow coupling options are as required by purchaser, expansion ring threaded, Storz clamp ring, etc.
  • Pro-Flow meets or exceeds the requirements of NFPA 1961.

Manufacturer's Warranty Information

*Pro-Flow hose shall carry a 10-year written warranty against defects in materials and workmanship.


4” thru 6” hose is supplied with Storz aluminum couplings

Custom lengths and special threads are available; please call us at 800-759-3473 for pricing.

Freight Charges: After you place your order, we will call or email you with the freight charge. If the freight charge exceeds your expectations, you may ask that your order be canceled. The maximum freight charge for your order for  Key Hose will be $125 or less.

Spec Sheet


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Key Fire Hose Pro-Flow Heavy Duty Lightweight Large Diameter Hose

  • Price based on selected options.

  • Available Options

    Delivery/Shipping Availability: Item ships directly from manufacturer. Ships in approximately 6-8 weeks.

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Tags: key fire hose, key fire hose, pro-flow, pro flow, fire hose, hose, ldh, large diameter hoses, rubber covered fire hoses