The Dorman 800-142 fuel line compression union is presented as a compact, alloy-steel fitting for 5/16 in. tubing, prized for corrosion resistance and simple installation. The reviewer notes straightforward threading, a snug seal for fuel lines, and a pack-of-three convenience; it is not rated for hydraulic brakes. How does it perform across different engine layouts, what tools are required, and does fitment vary by tubing wall thickness — more specifics follow.
Key Takeaways
- Dorman 800-142 is an alloy steel 5/16″ (0.3125″) NPT fuel line compression union sold in a 3-pack.
- Durable, corrosion-resistant construction suits fuel and general non-brake line repairs, not hydraulic brake systems.
- Quick installation on 5/16″ tubing with snug, predictable seals; verify tube OD and flare cleanliness.
- Users report positive fit and value, though adapters or thread sealant may be needed in some setups.
- Limited warranty/returns (typically 30-day on Amazon); confirm local availability, pricing, and vehicle fit before purchase.
Product Specifications and Materials
Product specifications matter when selecting a fuel line fitting, and the Dorman 800-142 gives a clear, compact profile for many light‑duty applications.
The reviewer notes alloy steel construction, 5/16 in. (0.3125″) thread size, NPT threads, dimensions 5.9 x 2 x 1.6 inches, weight 0.01 oz.
Alloy steel build with 5/16″ NPT threads — compact 5.9×2×1.6″ profile, ultra‑light 0.01 oz.
How durable is it? Material durability rates high for corrosion resistance in non-brake systems.
How precise is it? Dimensional accuracy supports predictable seals and straightforward installation.
Practical considerations: pack of 3, universal fit claims, not for hydraulic brakes.
Recommendation: verify vehicle fit with the garage tool before purchase.
Design Variants and Compatibility
Several common variants exist for the Dorman 800-142 family, each tailored to different routing needs and tube sizes: unions (straight joins), elbows (typically 45° or 90°), and tees for branching lines.
The review lists design variations: straight union (5/16 in. tube, 0.3125 in. NPT), 45° elbow, 90° elbow, and tee, alloy steel construction, brass accents.
What are compatibility factors? Match tube OD, thread type, pressure rating, and application (not for hydraulic brakes).
Practical notes: confirm 5/16 in. line fit, check thread sealant needs, consider space constraints, and verify pack quantity for project scope.
Performance and Installation Experience
When evaluating installation and in-service performance, technicians will note that the Dorman 800-142 compression union installs quickly on 5/16 in. (0.3125 in. thread size, NPT) steel tubing and provides a snug, low-profile connection suitable for fuel lines (not for hydraulic brake systems).
It speaks to users seeking freedom from complex fittings, offering clear installation tips and measured performance feedback.
- Torque and seating: tighten to hand-plus-quarter turn, verify 0.3125 in. engagement.
- Leak check: pressurize to operating fuel pressure, inspect for seepage.
- Fitment: confirm tube OD, use proper flare/cleaning for reliable seal.
Pros, Cons, and Use Cases
Having confirmed that the 800-142 seats properly and holds under operating fuel pressure, it helps to weigh the pros, cons, and common use cases before choosing this compression union.
Having confirmed the 800-142 seats reliably under operating fuel pressure, consider its pros, cons, and typical use cases.
Pros: durable alloy steel, 5/16 in. (0.3125″) thread, universal fit, packs of three, praised in user experiences;
installation tips: tighten to NPT spec, inspect ferrules, use 5.9 x 2 x 1.6 inch workspace allowance.
Cons: not for hydraulic brakes, may need adapters for some lines, minimal weight (0.01 oz) feels light.
Use cases: fuel line repairs, industrial runs, fleet maintenance.
Questions? Consider vehicle-fit first.
Availability, Pricing, and Warranty
Although stocked broadly through online and brick-and-mortar outlets, availability of the Dorman 800-142 Fuel Line Compression Union can vary by region and seller, so buyers are advised to confirm local inventory before undertaking a repair.
The reader is guided to pragmatic choices: check stock, compare pricing, verify fit. Availability options and warranty details are summarized below.
- Online: bulk 3-pack, UPC 019495104414, price ranges vary, shipping affects total.
- Local stores: immediate pickup, confirm 5/16 inch steel line compatibility, model 800-142.
- Warranty & returns: Amazon 30-day voluntary return; consult vendor for extended warranty details.
