8 Fairfax St SE
NAPA Auto Parts Genuine Parts Company
8 Fairfax St SE
Leesburg,  VA  20175
(703) 777-2055
Reserve Online Participant
Store Hours
Mon-Fri:7:30 AM-7:00 PM
Sat:8:00 AM-5:00 PM
Sun:9:00 AM-5:00 PM
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Straight Coolant Hose (Heavy-Duty 2-Ply) 1 3/8" x 1 3/8" x 3 ft. (100 psi)

Straight Coolant Hose (Heavy-Duty 2-Ply) 1 3/8" x 1 3/8" x 3 ft. (100 psi)

Part #: NBH 631
Line: NAPA Belts & Hoses

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Features & Benefits

Warranty: Standard : Limited Lifetime Warranty. See Manufacturer's Written Warranty.


FleetFlex Gold Coolant Hose is designed for demanding heavy-duty coolant/air applications. The two-ply bias fabric construction maximizes flexibility and strength, with an advanced EPDM tube and cover that resist “cold water leaks” and remain soft and pliable, even under adverse operating conditions.

  • Cover marked in 1 in. increments to facilitate approximate cut lengths, allows “custom-fit” installations
  • Engineered with compounds that resist electrochemical degradation
  • Approved for marine applications
  • Exceeds SAE 20R1 Type EC (Class D-1 Tube and cover, Standard Wall)
  • Temperature Range: -40 Deg. F to +257 Deg. F (-40 Deg. C to +125 Deg. C)
  • NOTE: For a maintenance free connection, use PowerGrip SB clamps
  • CAUTION: Do not use for fuel or oil transfer applications


Construction 2-Ply
Minimum Temperature -40 °F
Protective Sleeve Included No
Operating Temperature Range -40 Degrees to +257 Degrees
Mounting Hardware Included No
Overall Length 36
Sub Brand FleetFlex Gold
VMRS Code 042004050
Material EPDM Rubber
Clamp Included No
Maximum Temperature 257 °F
Quality Level Best
Brand NAPA
Spring Included No
Working Pressure 100 lb/in²
Inside Diameter 1.375
SDS Required No
Hose Steel Coil No

Safety Information

Vehicle Fitment Guide

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