Mini Split R-410A Leak Stop Kit — 28.2 oz Can with Gauge, Hose & 5/16″-to-1/4″ Service Port Adapter
This is the leak stop kit built for ductless work. It pairs a 28.2 oz (1.8 lb) can of R-410A with polymer-free leak stop and UV dye, a reusable gauge, a 1/4″ charging hose, and the 5/16″ female to 1/4″ male service port adapter that ductless mini splits require. Flare connections are a common source of slow mini split leaks, and this kit seals leaks up to 300 microns while recharging the unit through its 5/16″ port. Servicing a ducted system with a 1/4″ port? The R-410A leak stop kit with 1/4″ gauge and hose is the better fit.
Is the Mini Split Leak Stop Kit the Right Fit?
A standard 1/4″ hose won't thread onto a mini split's 5/16″ service port. This kit removes that problem: attach the adapter to the port, connect the hose, press the button, and the sealant, dye, and refrigerant go in together with no separate injector.
It's made for the R-410A ductless heat pump or air conditioner that slowly loses charge. If the leak is under 300 microns, the leak stop seals it. If it's larger, the UV dye marks the leak at the flare, line set, or coil so the repair is quick.
Ideal for: R-410A ductless mini split heat pumps and air conditioners with a 5/16″ service port and a minor refrigerant leak.
Need more capacity? Step up to the R-410A 25 lb Jug, Factory Sealed for full system or multi-zone charges.
Leak stop performance depends on leak size and location; leaks larger than 300 microns require mechanical repair. Charging amounts vary with system size, line-set length, and ambient conditions. For use by qualified HVAC/R technicians. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Refrigerant Can | R-410A with Leak Stop & UV Dye, 28.2 oz (1.8 lb) One-Step Can |
|---|---|
| Gauge & Hose | R-410A / R-404A / R-22 Gauge with 1/4″ SAE Fitting & Hose (reusable) |
| Service Port Adapter | Mini Split Service Port Adapter, 5/16″ Female to 1/4″ Male |
| Leak Stop | Polymer-free formula, seals leaks up to 300 microns |
| Leak Detection | UV dye for use with UV detection tools |
| Best For | R-410A ductless mini splits with a 5/16″ service port |
| Cylinder | DOT-39 approved, 1/4″ SAE self-sealing valve |
| Standard / Origin | Meets AHRI 700 • Made in USA |
Sealant, dye, refrigerant, gauge, hose, and the 5/16″ adapter all come in one package, so you can complete a ductless leak call without a separate injector or a hunt for the right fitting.
Leak Stop Blend & Mini Split Kit Features
R-410A Leak Stop & UV Dye Blend
- R-410A pre-mixed with leak stop and UV dye
- Polymer-free leak sealant
- Seals small leaks up to 300 microns
- No injector or extra sealant step
- Recharges and seals in one hookup
- Dye marks larger flare or line-set leaks
- Works with standard UV detection tools
- 28.2 oz (1.8 lb) net contents
- Meets AHRI 700 standards
- Made in USA
Mini Split Charging Kit
- 5/16″ female to 1/4″ male service port adapter included
- Adapter fits the 5/16″ port on ductless units
- Reusable push-button charging gauge
- Charging hose with 1/4″ SAE fitting
- Watch pressure while you charge
- Remove the adapter to use 1/4″ ducted ports
- DOT-39 approved disposable cylinder
- 1/4″ SAE self-sealing can valve
- No manifold setup needed for a top-off
- Complete ductless leak kit in one box
Frequently Asked Questions
Where do mini split leaks usually happen?
Flare connections at the indoor and outdoor units are common leak points, along with the line set and coils. The leak stop seals small leaks up to 300 microns, and the UV dye marks larger ones.
How do I hook the kit up to a ductless unit?
Thread the 5/16″ female end of the adapter onto the unit's service port, connect the 1/4″ charging hose to the adapter's male end and to the can, then press the button and watch the gauge.
Is leak stop or a plain recharge better for my mini split?
Use this kit if the system is losing charge from a small leak. If the leak has already been repaired and you only need refrigerant, the mini split R-410A recharge kit contains refrigerant without sealant or dye.
What if the flare is cracked or the leak keeps coming back?
Leaks larger than 300 microns need a mechanical repair, such as remaking the flare or replacing tubing. Budget Heating carries ductless mini split copper line sets and kits for those repairs.
Can I get a spare 5/16″ adapter?
Yes. The 5/16″ female to 1/4″ male mini split adapter is sold separately for your other hose sets.
Does this work on R-32 or R-454B mini splits?
No. This kit is R-410A only. Check the outdoor unit's data plate; for R-32 ductless units, use the mini split R-32 recharge kit instead.
