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The Conex 15mm straight compression fitting is an essential component for plumbers and DIY enthusiasts who need to join two 15mm copper or stainless steel pipes without the use of heat or soldering. It provides a robust, leak-free mechanical seal ideal for both residential and commercial plumbing systems, though it requires careful tightening to ensure the olive compresses correctly against the tubing.
| Model Part Number | A348a |
|---|---|
| Brand | Conex |
This specific fitting is designed for copper or stainless steel. Plastic pipe usually requires a dedicated insert to maintain its shape.
Only use fittings specifically rated and approved for gas applications; this coupler is intended for water and heating systems.
Once compressed, an olive is deformed and should ideally be replaced if the joint is disassembled.
Generally, compression fittings seal metal-to-metal and do not require sealant, though a small amount of pipe grease can assist during assembly.
This fitting is rated for standard domestic and commercial plumbing pressures; please consult local building codes for specific pressure requirements in your area.
Tighten the nut an additional quarter turn; if it still leaks, disassemble and inspect the olive for uneven compression.
Check the pipe end for burrs or deformation; file the edge smooth if necessary.
Unscrew completely, realign the nut squarely with the body, and restart the threading process by hand.
To install, first ensure the pipe is clean and free of paint or debris. Slide the compression nut and olive onto the pipe. Push the pipe into the fitting body until it seats against the internal stop. Tighten the nut by hand until firm, then use an adjustable wrench to tighten it roughly one-half to three-quarters of a turn further. Do not overtighten, as this can deform the olive and cause leaks.
Compatibility is strictly limited to 15mm nominal diameter pipe. Always perform a pressure test of the system before closing up any walls or finished areas. Periodic checks for signs of weeping are recommended in older systems.
