PATIKIL 5/16" to 1/4" Copper Reducers, 6-Pack, 99.9% Pure Copper
Product description
For an HVAC or refrigeration connection where copper tubing changes from 5/16" to 1/4", these PATIKIL reducers provide a compact transition with a sweat-solder connection. The six-piece set is made from 99.9% pure copper, making it useful to keep on hand for projects that require a direct size change rather than a coupling for tubing of the same diameter.
They’re also suited to residential and commercial plumbing, water supply and water-heating applications. Choose a same-size coupling when both tube ends match, choose this reducer when the connection calls for the two stated sizes.
Tips for day-to-day use
Match the reducer to the tubing measurements and the sizing convention for the job. HVAC and refrigeration tubing is measured by outside diameter, while plumbing tubing is measured by inside diameter. The listed end sizes are actual sizes, not nominal pipe sizes, so check the relevant measurement before fitting the reducer. It is stated to work with Type M, L or K copper tubing when the dimensions match.
For the sweat-solder connection, clean and apply flux to the pipe and fitting, heat with a torch, then apply solder. Let the joint cool before handling. This straightforward sequence makes the reducer suitable for planned plumbing and HVAC work where a soldered transition is required.
Tech specs
- Type: Copper reducing coupling
- Material: 99.9% pure copper
- Larger end inner diameter: 5/16" (8 mm)
- Smaller end inner diameter: 1/4" (6.35 mm)
- Connection: Sweat solder
- Thickness: 1 mm
- Total length: 18.5 mm
- Quantity: 6 copper reducers
Where it shines
The stepped design connects tubing with different diameters in a single fitting, helping keep a compact transition in a copper pipe run. It’s a practical choice for HVAC and refrigeration installations, as well as water supply and water-heating projects, when the tubing size calls for a 5/16" to 1/4" change. The copper construction and solder connection suit work where the joint is made directly to the tubing rather than assembled with a threaded connector.
In a repair or installation, first identify whether the tube is being sized by its inside or outside diameter, then select the matching ends. This is especially useful when working across plumbing and HVAC applications, since the measurement convention differs between them. With six reducers in the pack, the set is also handy for projects that call for more than one matching transition.
Final verdict
PATIKIL’s six copper reducers are a focused choice for joining 5/16" and 1/4" tubing with a sweat-solder connection. Their actual end dimensions, copper construction and suitability for HVAC, refrigeration and plumbing applications make them useful for installers and DIYers planning a correctly sized copper transition.