PE PEG Pneumatic Push-In Tee Fittings 4–10mm Reducing Equal – Air Compressor Fluid

Description

PE/PEG Pneumatic Push-In Tee Fittings – Equal & Reducing, 4–10mm OD Tubing

PE (equal tee) and PEG (reducing tee) push-in pneumatic fittings provide fast, tool-free connections for splitting or reducing pneumatic and fluid circuits. The PE series connects three tubes of the same diameter; the PEG series connects tubes of two different diameters — allowing a larger supply line to branch into a smaller distribution line without additional reducers. Both series use a barb-lock mechanism for secure, semi-permanent connections in compressed air, coolant, and light fluid systems.

Available Part Numbers & Configurations

PE4: Equal tee, 4mm × 4mm × 4mm
PEG6-4: Reducing tee, 6mm × 6mm × 4mm (6mm main, 4mm branch)
PEG8-4: Reducing tee, 8mm × 8mm × 4mm (8mm main, 4mm branch)
PEG8-6: Reducing tee, 8mm × 8mm × 6mm (8mm main, 6mm branch)
PEG10-6: Reducing tee, 10mm × 10mm × 6mm (10mm main, 6mm branch)
PEG10-8: Reducing tee, 10mm × 10mm × 8mm (10mm main, 8mm branch)

Key Specifications

Body Material: PE (polyethylene) or PA (nylon) — variant dependent
Connection Type: Push-in barb lock (semi-permanent)
Tubing Compatibility: Nylon (PA), polyurethane (PU), polyethylene (PE) rigid OD tubing
Working Pressure: 0–1.0 MPa (0–145 PSI)
Temperature Range: 0°C to +60°C
Media: Compressed air, water, light non-corrosive fluids

PE vs PEG — Naming Convention Explained

PE = Push-in Equal tee. All three ports are the same diameter. Use when all three connected tubes are the same size.
PEG = Push-in Equal-to-Greater reducing tee. Two ports are the larger (main line) diameter; one port is the smaller (branch) diameter. The format is PEG[main]-[branch]: PEG8-4 means 8mm main ports, 4mm branch port.

What Questions Does This Product Answer?

"What is the difference between PE and PEG pneumatic fittings?" — PE is an equal tee (all ports same size). PEG is a reducing tee (two large ports + one small branch port). PEG fittings eliminate the need for a separate reducer + equal tee in reducing branch circuits.
"Can I use these fittings for compressed air at 8 bar?" — No. These fittings are rated to 1.0 MPa (10 bar / 145 PSI) maximum. For systems operating at 8 bar (0.8 MPa), these fittings are within rating but leave minimal safety margin. For industrial compressed air at 8–10 bar, consider metal body push-to-connect fittings (SMC, Festo, Parker) rated to 1.5–2.0 MPa.
"How do I choose between a reducing tee and two separate fittings?" — A PEG reducing tee is more compact, lower cost, and has fewer potential leak points than a straight reducer + equal tee combination. Use PEG when the branch line is smaller than the main supply line.
"Are these fittings reusable?" — Barb-lock fittings are semi-permanent. Tubing can be removed by cutting close to the fitting and extracting the stub with pliers, but the fitting may not reseal reliably after repeated removal. For reusable connections, use push-to-connect fittings with a collet release mechanism.

Typical Applications

Air compressor circuits: Branching main air supply to multiple tools or zones
CNC coolant systems: Splitting coolant supply to multiple nozzles with different flow requirements
Aquariums & hydroponics: Air pump distribution to multiple tanks or grow beds
3D printing: Bowden tube routing, multi-zone cooling circuits
Irrigation: Drip line distribution with mixed tube sizes

Installation Notes

Cut all tubing ends square — angled cuts reduce barb contact area and cause leaks
Push tubing firmly until it contacts the internal stop — partial insertion is the primary cause of blowout under pressure
For the reducing port (smaller branch on PEG fittings), ensure the smaller tube is fully seated before pressurizing
Do not exceed 60°C — PE body softens and loses grip on tubing OD at elevated temperatures