DIAMOND pipe fitting MUFA internal thread 32 mm x 1 PN20 (PP-R)

DIAMOND pipe fitting MUFA internal thread 32 mm x 1 PN20 (PP-R) is a polypropylene‑random (PP‑R) coupling designed to connect a smooth PP‑R pipe to a threaded male connection. The fitting has a 32 mm socket for fusion welding to PP‑R piping and a 1" internal metric thread suitable for standard threaded brass or plastic components. It is manufactured for use in hot and cold water distribution systems with a PN20 pressure rating, offering a corrosion‑resistant and chemically stable connection point in residential and light commercial installations.

Advantages

The PP‑R construction provides long service life, resistance to scaling and corrosion, and low thermal conductivity compared with metal fittings. The internal thread allows easy integration with threaded valves, adapters or fixtures without the need for additional transition fittings. The PN20 rating indicates suitability for systems with higher operating pressures and temperatures typical of domestic hot water circulation. The smooth fusion socket ensures a leak‑resistant joint when correctly welded to matching PP‑R pipe.

Suitable for

• Hot and cold potable water distribution in residential buildings
• Domestic central heating circuits where PN20 class is required
• Connections to threaded valves, gauges or appliances
• Plumbing repairs and retrofits where corrosion resistance is needed

Key specifications

• Material: polypropylene‑random (PP‑R)
• Socket size for fusion: 32 mm
• Internal thread: 1" metric/internal (compatible with standard threaded fittings)
• Pressure rating: PN20
• Application temperature: suitable for typical hot and cold water temperatures within PN20 limits
• Typical uses: water distribution, heating systems, appliance connections

How to use

Prepare the PP‑R pipe by cutting square and cleaning the end face. Use an appropriate PP‑R welding tool to heat the socket end of the fitting and the pipe to the recommended fusion temperatures and join them following the welding equipment manufacturer's procedure. After cooling, screw the mating threaded component into the internal thread, applying thread sealant or PTFE tape as required for the material of the mating part. Ensure alignment and allow the fused joint to reach full cooling time before pressurizing the system.

Usage recommendations

Verify compatibility of the threaded mating component with PP‑R fittings and select appropriate thread sealing material for metal or plastic counterparts. Installations should conform to local plumbing codes and operating limits for PN20 systems; perform pressure testing after installation according to industry standards.