Male Socket 25×1/2″ RAKtherm PPRc

This is a transition fitting that connects a 25mm PPR pipe to a 1/2″ male threaded brass/metal component. Used widely in hot & cold water and HVAC systems where you need to switch from PPR to threaded valves, taps, or metal pipes.

1. Product Description Male Socket 25×1/2″ RAKtherm PPRc

What it is
A PPR Male Threaded Adaptor, also called a “Male Socket” or “Male Adaptor”. One end is a 25mm PPR socket for fusion, the other end is a 1/2″ BSP male brass thread.

Material

• Body: Polypropylene Random Copolymer Type 3 (PPRc), food-grade, non-toxic
• Threaded Insert: Nickel-plated brass, corrosion-resistant
  The brass insert is molded into the PPR body during manufacturing, making it a one-piece, leak-proof transition.

Pressure Rating: PN25
Rated for 25 bar at 20°C. PN25 is RAKtherm’s heavy-duty grade for hot water, HVAC, and pressurized systems.

Brand & Origin
RAKtherm is German-engineered, manufactured in UAE. Meets DIN 8077/8078, DIN EN 15874. Typical warranty in GCC: 30 years.

2. Key Specifications – 25×1/2″ Male Socket

3. Installation Method

You’ll use two different joining methods on this one fitting:

PPR Side – Socket Fusion

1. Cut: Cut 25mm PPR pipe square, deburr inside/outside.
2. Mark depth: Mark welding depth on pipe ≈ 16mm for 25mm pipe.
3. Heat: Set fusion machine to 260°C. Insert pipe + socket into 25mm dies. Heat for ∼7 sec.
4. Join: Push together straight without twisting. Hold ∼4 sec.
5. Cool: Full cooling before pressurizing.

Brass Thread Side – Threaded Connection

1. Seal: Use PTFE tape or thread sealant on the 1/2″ male brass thread.
2. Connect: Screw into female threaded valve, tap, flex hose, or metal fitting.
3. Tighten: Use wrench on the hexagon on the brass insert only. Don’t grip the PPR body — it can crack.
4. Do not over-torque: Brass insert can spin in PPR if forced.

Important install notes:

• Keep flame/torch away from PPR body when soldering nearby copper.
• Always use RAKtherm pipes with RAKtherm fittings for warranty.
• Pressure test system to 1.5x working pressure after install.

4. Usage & Applications

1. Fixture Connections: Transition from 25mm PPR supply line to 1/2″ angle valves under sinks, toilet inlets, water heaters.
2. HVAC: Connect PPR chilled/heating lines to FCUs, AHUs, or brass manifolds with 1/2″ female ports.
3. Appliances: Washing machine taps, filters, pumps with 1/2″ inlets.
4. Mixed Systems: Where part of the system is PPR and part is copper/GI/brass.
5. Meter/Valve Tie-in: Connect PPR distribution to threaded ball valves or meters.

Why use PPR + brass vs all-metal:

• No corrosion at PPR side, no scale buildup
• Thermal insulation reduces heat loss in hot water lines
• Fusion joint on PPR side is monolithic = no leak points
• Brass thread gives mechanical strength for disassembly/service

5. PN25 vs PN20 vs PN16 – Why it matters

For HVAC and hot water you want PN25. PN25 wall thickness is higher, so ID is smaller but pressure/temp safety is better.

Quick check before you buy:

1. Confirm thread is BSP, not NPT, if connecting to UK/GCC fittings.
2. If the 1/2″ device is plastic, use a female PPR adaptor instead to avoid cracking plastic threads.
3. For exposed sun areas, use RAKtherm UV-stabilized pipes or add insulation.