GZJoSum Grease Gun Hose Replacement 42-inch 1/8 in NPT – Flexible Hose with Coupler for 20V Max

A 42-inch, 1/8" NPT flexible replacement grease hose with coupler designed to restore reach and reliable high-pressure performance for compatible 20V Max cordless grease guns.

If your cordless grease gun has lost reach or the original hose is worn, the GZJoSum DCGG5703-42 hose kit provides a direct, heavy-duty replacement. Engineered to mate with a range of DCGG570 and DCGG571 series tools, this assembly offers a full 42 inches of flexible service, a 1/8" bore for standard fittings, and a coupler ready for fast connection. It handles demanding shop and field tasks up to its rated working pressure while improving access to tight grease points.

Which cordless grease guns will this replacement hose fit?

This hose assembly is made to match several 20V Max cordless models and common battery-powered grease guns. Confirm compatibility by checking model numbers and thread specs; the hose uses a 1/8" NPT connection and follows industry dimensions for these tool lines.

• Direct fit: DCGG570B Type 1, DCGG570K Type 1, DCGG571B Type 1, DCGG571M1 Type 1.
• Also compatible with part numbers like N365752 and DCGG5703-42.
• Suits many hand-pump and battery grease guns that use 1/8" NPT hose assemblies.

How durable and safe is the GZJoSum 42" hose under pressure?

The hose is built from reinforced materials intended for repeated use in workshop and outdoor environments. It is rated for a high maximum working pressure and resists kinking so grease delivery remains consistent and predictable around machinery and fittings.

• Length: 42 inches for extended reach into confined areas.
• Bore size: 1/8" to match standard grease fittings and couplers.
• Pressure capability: rated to handle typical high-pressure grease applications up to its specified limit.

What comes in the package and how easy is installation?

The kit ships as a single ready-to-fit hose assembly with an attached coupler, so installation is typically a simple swap of the old hose for the new line. No special tools are usually required beyond tightening the NPT connections and checking for secure seals before pressurizing the system.

• Included: one 42" replacement grease gun hose assembly with coupler.
• Quick connection: 1/8" NPT threads for straightforward attachment.
• Installation tip: hand-tighten then quarter-turn with a wrench; test for leaks before full use.

Where does this hose perform best and what tasks is it suited for?

Its long, flexible design makes the hose especially useful for reaching recessed grease fittings on vehicles, equipment, and industrial machinery. The assembly is intended for maintenance, repairs, and routine lubrication where a short rigid head can’t access the service point.

• Ideal for automotive chassis, agricultural equipment, and construction machinery.
• Useful when servicing hard-to-reach zerk fittings and pivot points.
• Works well as a shop spare for cordless and hand-pump grease guns.

Who is this for? The GZJoSum DCGG5703-42 hose kit is aimed at mechanics, maintenance techs, fleet operators, and DIYers who need dependable extended reach and a robust replacement for worn or damaged hoses on 20V Max-compatible grease guns. If you require a long, flexible, high-pressure hose that fits established 20V Max tool models and common grease fittings, this assembly offers a practical and cost-effective repair or upgrade option.