1870 Dunbier Hydraulic Union Bundy Joiner | Marine Trailer Part
1870 Dunbier Hydraulic Union Bundy Joiner | Marine Trailer Part
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🔧 Product Description
Dunbier Hydraulic Bundy-Tube Straight Joiner – Part Number: 1870
A brake-system hydraulic fitting used to joins two compatible rigid Bundy brake tubes in a straight line. The fitting is dimensioned for the Dunbier/Mackay trailer brake-line system and must be matched by thread, flare type and tube size.
⚙️ Key Features
- Trailer hydraulic brake fitting
- Compatible with the Dunbier/Mackay brake-line family
- Corrosion-resistant brass, plated steel or copper construction as applicable
- Allows service or custom routing of trailer brake plumbing
- Designed for pressure-tight brake-fluid connections
📏 Specifications
- Brake line size and flare type must match the installed system
- Thread must start by hand without force
- Use sealing gasket only where the fitting is designed for one
🔄 Cross Reference & Related Parts
- Dunbier: 1870
- Related braided brake lines: Dunbier 1893–1901
- Related rigid Bundy tubes: Dunbier 1890–1900
🚤 Trailer Compatibility & Application
- Suits compatible Dunbier hydraulic disc-brake systems
- Not interchangeable with metric, bubble-flare or automotive fittings unless thread and seat are identical
- Inspect mating ports before installation
🔌 Function
Provides a sealed hydraulic connection that joins two compatible rigid Bundy brake tubes in a straight line.
⚠️ Common Signs of Failure
- Brake fluid weeps at the fitting
- Threads or flare seat are damaged
- Fitting is cracked, rounded or heavily corroded
- Line cannot be tightened without misalignment
- Air repeatedly enters the system at the joint
🛠️ Installation & Safety
- Use proper flare-nut spanners
- Do not use thread tape on flare-seal fittings
- Replace copper gaskets after disturbance where specified
- Support lines to prevent vibration fatigue
- Pressure-test and bleed the system after service
📦 Condition
- Genuine Dunbier Marine Products trailer component
- Brand new
- Supplied as one hydraulic brake-line fitting
- Supplied in original or equivalent packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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