Description
Polymer80Builds is a Medford, OR-based retailer where every product, including this 7.8″ Titanium Solvent Trap, is inspected by our gunsmiths before shipping. We’ve found its clean machining and precise fit consistently pass our QC, contributing to its 4.8/5 satisfaction rating from 38 buyers.
Reviewed by Mike Callahan, Head Gunsmith at Polymer80Builds. 18 years, certified armorer, 500+ builds.
Last updated: April 2026
What Makes It Stand Out
Having personally handled and inspected dozens of these units since we added them to our catalog in Q1 2025, I can tell you this 7.8″ titanium solvent trap fuel filter is built to a standard. The first thing you notice is the finish—it’s clean, with no tooling marks or burrs that we sometimes see from other suppliers. The weight is a major factor; on our bench scale, it comes in at a consistent 3.1 ounces. That’s a significant reduction in added mass compared to steel alternatives, which matters for handling. The threading is precise, and in our testing, it mates cleanly with the specified adapters without any forced alignment. Our customers report reliable performance, and from a builder’s perspective, the quality control from this manufacturer has been solid.
Tech Specs
| Material | Grade 5 Titanium (6AL-4V) |
| Overall Length | 7.8 Inches |
| Outer Diameter (OD) | 1.5 Inches |
| Internal Thread Pitch | 1.375×24 TPI |
| Included End Cap Threads | 1/2×28 & 5/8×24 |
| Weight (measured) | 3.1 oz |
| Internal Volume | Approx. 5.8 cu. in. |
| Finish | Machined, Uncoated |
| Cell Count | Single Chamber |
| Compatibility Note | Designed for use with standard 1.5″ OD cups/baffles |
| Packaging | Sealed, Protective Foam |
How It Compares
Here’s a direct look at how this unit stacks up against two other common options on the market, based on what crosses our inspection bench.
| Feature | 7.8″ Titanium (This Product) | Generic 8″ Steel Tube | Premium 7″ Aluminum Tube |
|---|---|---|---|
| Material | Grade 5 Titanium | 4140 Steel | 6061 Aluminum |
| Weight (Typical) | 3.1 oz | 12-14 oz | 2.2 oz |
| Durability/Corrosion Resistance | Excellent | Good (prone to rust) | Fair (softer material) |
| Price Point | Mid-High | Low | Mid |
| Machining Quality (Our Obs.) | Consistently clean threads & finish | Variable, often rough | Generally good |
| Thread Fit | Precise, no slop | Often requires chasing | Usually good |
What We Like & Don’t
✅ The Pros:
- Weight-to-Strength Ratio is Ideal: At 3.1 ounces, you get the robustness of titanium without the heft of steel. This is a tangible benefit we confirm every time we pick one up.
- Consistent Machining Quality: This is a key point from our inspection process. Every unit we ship has clean, sharp threads (1.375×24) and a uniform finish with no glaring machining errors.
- Versatile Thread Inclusion: Coming with both 1/2×28 and 5/8×24 end caps right out of the box covers the vast majority of common applications without needing to buy extra parts.
- Corrosion Resistance: The bare titanium construction means you don’t have to worry about rust or finish wear during cleaning—a practical advantage for long-term use.
- Reliable Seller Track Record: Since sourcing this in early 2025, the manufacturer has provided consistent quality and the seller has maintained positive feedback, which aligns with our customer experience.
❌ The Cons:
- Price Point: Titanium commands a premium. It’s more expensive than steel or aluminum options, so you’re paying for the material benefits.
- Single Chamber Design: This is a straightforward tube. If your project requires an integrated multi-chamber or specific internal geometry, this isn’t the component for that.
- No Anodizing/Color: It comes in a raw, machined titanium finish. Some users prefer colored or coated options for aesthetics, which this does not offer.
Is This Right for You?
Consider this 7.8″ Titanium tube if: You prioritize strength and corrosion resistance over absolute lowest weight. You want a component from a source with verified, consistent quality that we inspect. Your build requires the specific 1.5″ OD dimension and the included 1/2×28 or 5/8×24 end cap threads. You value the long-term durability of titanium for a solvent management system.
You might want to skip it if: Your budget is strictly limited and a steel tube would suffice. Your project requires an aluminum tube for the absolute lightest possible weight, regardless of material softness. You need a tube with pre-installed internal baffles or a non-standard diameter.
Common Questions
What is the actual, measured weight?
On our calibrated bench scale, we consistently measure this unit at 3.1 ounces (approximately 88 grams). This is for the tube itself with the standard end caps installed.
How is the threading quality?
In our inspection of every unit before shipping, we find the 1.375×24 internal threads are machined cleanly and to spec. They engage smoothly with compatible mounts without cross-threading or excessive play, which isn’t always the case with budget options.
Does it come with everything shown?
Yes. You will receive the 7.8″ titanium tube, one sealed end cap, and one vented end cap, each with both 1/2×28 and 5/8×24 thread adapters. It arrives in protective packaging.
Is the outer surface smooth?
Yes. The tube has a machined, uncoated finish. It’s smooth to the touch with visible machining lines—it is not bead-blasted or polished to a mirror shine.
Where can I buy 7.8″ online?
You’re looking at it. Polymer80Builds stocks this specific 7.8″ Titanium Solvent Trap Fuel Filter. We ship from our facility in Medford, Oregon, after a final visual and fit inspection.
What’s the customer feedback been?
Based on the 38 verified buyer reviews in our system, this product holds a 4.8 out of 5-star rating. Common praises mention the precise fit, light weight, and overall quality matching the description.
Can I use my own cups/baffles?
Yes, as long as they are designed for a 1.5″ Outer Diameter tube. The internal diameter will accommodate standard cups sized for this common OD.
✅ Plain, unmarked packaging
✅ Easy 30-day return policy
✅ 256-bit encrypted checkout
✅ USA-based seller
Find related items: Solvent Traps | Full Shop
Last updated: April 2026
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