gates_logo POWERING PROGRESS™

Marine Master™ Coolant (12-175)D


Formerly 75W Standard Wall & 76W Heavy Wall Coolant Hose

(Specification 4175EC)

RECOMMENDED FOR: Open end water discharge applications and coolant connections on marine and stationary engines.

TEMPERATURE: -40°F to +257°F (-40°C to +125°C) continuous service.

CONSTRUCTION: Tube: Type P (EPDM). Black.
Reinforcement: Multiple plies of synthetic fabric.
Cover: Type P (EPDM). Black with white stripe. Heat and ozone resistant.
Design Factor: 4:1

COUPLINGS: 5, 6 or 7. Reference the Hose Coupling Section.

PACKAGING: 50' length coiled and wrapped in polyethylene.
50' carton: 7/8" through 1" sizes only.

BRANDING: Continuous transfer label. Example: “Gates® Marine Master™ Coolant (12-175)D 2 1/2 60 psi WP Made in U.S.A.”

SPECIAL ORDER REQUIREMENTS: Special production runs require minimum order quantities of 400 feet for sizes through 4" and 200 feet for sizes above 4". If a special transfer label is required, contact Gates Corporation for minimum quantity.

REMNANT LENGTHS: Remnant lengths are sometimes available in popular sizes at a discount. Contact Gates Corporation for pricing, order requirements and availability.

STANDARDS: Meets SAE 20R1, Class D-2, tube and cover, standard wall.

Cover: ARPM (Class C) Limited oil resistance.


(Specification 4176HD)

RECOMMENDED FOR: Water discharge at higher pressures than are possible with 75W and for heavy duty use on coolant connections on marine and stationary engines.

TEMPERATURE: -40°F to +257°F (-40°C to +125°C) continuous service.

CONSTRUCTION: Tube: Type P (EPDM). Black.
Reinforcement: Multiple plies of synthetic fabric.
Cover: Type P (EPDM). Black. Heat and ozone resistant.
Design Factor: 4:1

COUPLINGS: 1, 5, 6 or 7. Reference the Hose Coupling Section.

PACKAGING: 50' length coiled and wrapped in polyethylene.
50' carton: 7/8" size only.

BRANDING: Continuous transfer label. Example: “Gates® Marine Master® Coolant (12-175)D 2 1/2 75 psi WP Made in U.S.A.”

SPECIAL ORDER REQUIREMENTS: Special production runs require minimum order quantities of 400 feet per size. If a special transfer label is required, contact Gates Corporation for minimum quantity.

REMNANT LENGTHS: Remnant lengths are sometimes available in popular sizes at a discount. Contact Gates Corporation for pricing, order requirements and availability.

STANDARDS: Meets SAE 20R1, Class D-2, tube and cover, heavy wall.

Cover: ARPM (Class C) Limited oil resistance.


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