AClengda 500pcs Automotive HVAC Hose Gasket, R22/R410 Manifold Pin, 1/4" Inflatable Hose air Conditioning Repair Manifold Seal O-Ring, Valve Hose Gaskets Kit for Refrigeration Charging Hose

A field tech’s take on a 500-piece hose gasket kit

My service bag is full of little consumables that quietly save the day, and hose gaskets are near the top of that list. I picked up the AClengda gasket kit to see if it could become my go-to stash for sealing 1/4-inch refrigeration charging hoses, manifold couplers, and related odds and ends. After a couple of weeks using it on automotive A/C and residential HVAC calls, here’s how it stacked up.

What’s in the box

The kit is a 500-piece assortment centered around standard 1/4-inch hose and manifold sealing. It includes:
- Green and black 1/4-inch hose gaskets (the ones that sit inside hose ends and manifold outlets)
- White plastic sealing rings that act as stiffer backups or spacers
- A lot of “top rod” pins for R22 and R410-style couplers (the small depressor pins that push Schrader valves), plus some gaskets for can-tap/openers

The assortment is generous. I never felt short on sizes that matter for routine hose reseals. The case keeps everything tidy, though I wish the compartments were labeled from the factory. If you buy it, take five minutes to label each section; it avoids guesswork later.

Fit and compatibility

This kit is aimed specifically at standard 1/4-inch SAE hoses and manifolds. That matches most of my automotive hoses and many of my older HVAC sets, but there are two important caveats:

• Many R410A residential systems use 5/16-inch service ports, and some hoses and couplers match that. This kit does not include 5/16-inch hose gaskets.
• Certain manifolds and quick couplers have proprietary gasket profiles or square-cut seats. If your gear requires a specific OEM-shaped seal, these universals may not seat perfectly.

On my tools, the green gaskets dropped into Yellow Jacket and generic 1/4-inch hoses without drama. They also fit a Robinair-style manifold outlet. On one older off-brand coupler with a shallow seat, the green gasket was a hair loose; swapping to the slightly firmer white backup washer plus a green gasket tightened things up. The black gaskets felt just a shade softer and were handy when the seat needed a little more “give” to seal a pitted flare.

As for the “top rod” pins, they’re useful if you’ve got couplers that aren’t depressing the Schrader consistently. Length varies between manufacturers, so treat these as serviceable replacements rather than exact matches. I used two to revive a sticky R22 coupler and both seated fine.

Materials and build

The green gaskets behave like HNBR: they’re supple, resilient, and compatible with common refrigerants and oils (R22, R134a, R410A with mineral/POE/PAG oils). The black gaskets feel like standard NBR. The white rings are noticeably stiffer—think PTFE or a similar plastic—which makes them good as support washers behind a softer seal if you’re dealing with a wider gap or a seat that’s not pristine.

From a practical standpoint, the green ones became my default because they seal well without requiring much torque. The blacks are handy for “one more chance” on a marginal seat. The white rings earned their keep as shim/backup washers to take up slack in worn hose ends.

Performance in use

I swapped in fresh gaskets on two 1/4-inch manifold sets and three hoses that had started to hiss under vacuum. Here’s how they performed:

• Vacuum test: All resealed connections held below 500 microns for 10 minutes on a micron gauge, where previously I could watch the rise. That’s good enough for me to trust the hose ends again for evacuation work.
• Pressure test: With dry nitrogen at around 300 psi, I sprayed bubbles on the resealed connections. Four of the five sealed up immediately. One coupler wept slightly until I added a white backup washer behind the green gasket, which took it to zero bubbles.

On automotive A/C, I resealed the hose that threads onto standard R134a adapters. The fit was spot on, and the connection didn’t require any extra grunt. I also tried one of the pins in a coupler that wasn’t depressing a core enough to flow—no more sputter after the swap.

In day-to-day use, I didn’t see any early cracking or swelling after exposure to POE oil and refrigerant. After a week of connecting and disconnecting, the gaskets I installed still looked round and seated.

Durability and limitations

These are inexpensive service parts, and they performed like decent, shop-grade consumables. A few observations:

• On clean, undamaged seats, sealing was consistent and predictable.
• On nicked or pitted flare faces, the softer black gaskets sealed better at first but deformed more after repeated cycles. I’d treat them as “get it sealed now, replace the fitting soon” options.
• If a hose end or coupler is worn oval or the seat edge is rolled, no gasket will save it. This kit can buy you time, but it won’t restore a mechanically damaged fitting.

Also, expect that not every assortment piece will fit every brand’s coupler internals. The volume of parts is a safety net; it doesn’t replace the precision of an OEM kit tailored to one specific tool.

Ease of use

Replacement is as simple as fishing out the old gasket with a pick, wiping the seat, and dropping in a new one. A couple of tips that helped:

• Lightly oil the gasket with the system-compatible oil (POE, PAG, or mineral) before installation; it seats easier and reduces twisting.
• Don’t overtighten to force a seal—if it leaks, try a different gasket thickness or add a white backup ring.
• If a connection still leaks with a fresh gasket, check the Schrader core and the coupler face; failure there masquerades as a bad gasket.

Value

For the sheer quantity, this kit is an easy add to a service truck or home bench. I didn’t need to think twice about replacing a questionable seal, and I appreciated not hunting for a single brand-specific part when time mattered. If you rely on a specific manifold daily, keep the OEM gasket kit on hand for that tool and use this as your general-purpose refill and emergency fix.

Who it’s for

• Great for HVAC techs and DIYers who use 1/4-inch hoses regularly and want a broad selection of seals in one place.
• Useful in automotive A/C work where standard 1/4-inch hose connections are common.
• Less ideal if your primary kit is built around 5/16-inch R410A hoses or proprietary couplers.

The bottom line

The AClengda gasket kit did what I needed: it stopped small leaks fast and kept my 1/4-inch hoses and manifolds in the game without a parts run. The materials feel appropriate, the assortment covers the most common scenarios I run into, and the white backups solve the occasional outlier.

It isn’t a cure-all. If your fittings are chewed up, replace the hardware. If you’re running nonstandard hose sizes or highly specific couplers, you may need the exact OEM seals. But as a general-purpose, always-on-hand stash, it earns its space in the truck.

Recommendation: I recommend this kit as a practical, budget-friendly stock of 1/4-inch hose and manifold gaskets for HVAC and automotive A/C work. It’s reliable on standard gear, flexible enough to handle odd seats with the included backups, and inexpensive to deploy liberally. Keep it as your first line for routine reseals and as a backup even if you carry OEM kits for your primary manifold.