Eternal line

PPR Female adaptor

Female BSP parallel (G) thread, not NPT

The brass insert has a female BSP parallel (G) thread. It takes male BSP-threaded valves, taps, meters and fittings of the matching size. It is not made for American NPT (FIP/MIP) male threads, which have a different thread form, so an NPT part needs a suitable thread adaptor.

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Description and application

The THERMALINO PPR female adaptor joins to a PP-R pipe by socket fusion on one side and has a female BSP parallel (G) thread in a CW617N brass insert on the other, so a PP-R line can connect to taps, valves, meters and other male-threaded metal parts. It is rated PN25 to EN ISO 15874-3 for hot and cold water, with an operating temperature of 70 °C and a maximum of 95 °C.

The PPR female adaptor from the THERMALINO Eternal line is a transition fitting between a PP-R pipeline and threaded metal parts. One end is a socket that fuses to the pipe. The other end is a brass insert with a female BSP parallel thread, also known as gas thread (G). Installers often call this kind of fitting a PPR coupling with thread. It comes in six combinations: Ø20 × 1/2", Ø20 × 3/4", Ø25 × 1/2", Ø25 × 3/4", Ø32 × 3/4" and Ø32 × 1". The body is moulded from prime-grade polypropylene random copolymer (PP-R, type 3) supplied by leading polymer producers. It is designed to fuse with THERMALINO PP-R pipes, giving a homogeneous joint and a long service life. The threaded insert is CW617N brass, a European-standard grade with a lead content below 2.2 %. The fitting complies with EN ISO 15874-3 and is rated PN25, with an operating temperature of 70 °C and a maximum of 95 °C. The permissible pressure at each temperature is given in the technical data sheet. The adaptor is used in hot and cold water supply and in heating installations, wherever a PP-R line must end at a tap connector, valve, water meter, water heater or another male-threaded fitting. The socket is joined to the pipe with a socket fusion tool, using the heating, joining and cooling times for the pipe size. The male part is then screwed into the brass thread with a thread sealant suited to the medium and temperature. Hold the fitting while you tighten so that the torque does not load the fused joint.

Where it is used

Hot and cold water supply in houses and apartments
Hotels, hospitals, schools and office buildings
Connecting PP-R lines to taps, valves, water meters and water heaters
Central heating and radiator connections, within the operating temperature of 70 °C and maximum of 95 °C
Chilled water and cooling water lines
Irrigation, greenhouses and agricultural water supply
Industrial and process water lines, subject to the chemical resistance table in the technical data sheet and the medium's compatibility with brass
Compressed air lines, only where pressure and temperature stay within the rating in the technical data sheet

Technical summary

SKU: THL-E-PPR-0024
Origin: Made in Türkiye
HS code: 3917.40
Size range: Ø20 – Ø32
Material: PP-R
Nominal pressure: PN25
Operating temperature: 70 °C
Max. temperature: 95 °C
Connection: Socket fusion × Female thread
Thread type: BSP parallel (G)
Insert material: Brass (CW617N)
Standard: EN ISO 15874-3

Questions

How do I join a new PP-R hot water line to an existing steel or brass fitting that has a male thread?: A PPR female adaptor is the fitting that joins a PP-R line to a male-threaded metal part. The PP-R socket is fused to the pipe, and the metal part screws into the brass female BSP parallel (G) thread, sealed with a thread sealant suited to hot water. The adaptor is rated PN25, with an operating temperature of 70 °C and a maximum of 95 °C.
Is it bad practice to cut a thread on the end of a PP-R pipe and screw a valve directly onto it?: Yes. A PP-R pipe should not be threaded. Use a threaded transition fitting such as the PPR female adaptor instead. Cutting a thread removes wall thickness and leaves notches that weaken the pipe under pressure and heat. With the adaptor, the pipe stays whole inside a fused socket and the thread is carried by a CW617N brass insert.
Does FIP mean the same as the female thread on a PPR female adaptor, and will an NPT male fitting fit it?: No. FIP (female iron pipe) is the North American term for a female NPT tapered thread, while the PPR female adaptor has a female BSP parallel (G) thread. The two thread forms are different, so the adaptor should be paired with male BSP-threaded parts. An NPT component needs a suitable thread adaptor.
What does a PPR female adaptor do in a plumbing system, and how is it different from a plain PPR coupling?: A PPR female adaptor joins a PP-R pipe to a threaded metal part. A plain PPR coupling only joins two PP-R pipes. One end of the adaptor is a socket that fuses to the pipe. The other end is a female BSP thread in a brass insert that takes a tap connector, valve, meter or other male-threaded part.
Which PPR female adaptor do I need to connect a 3/4 inch valve to a 20 mm or 25 mm PP-R water pipe?: The PPR female adaptor comes with a 3/4" female thread for Ø20, Ø25 and Ø32 mm pipe, so choose the version that matches your pipe's outside diameter. In trade use, Ø20 mm PP-R pipe is often called 1/2", Ø25 mm 3/4" and Ø32 mm 1". The range also includes 1/2" threads for Ø20 and Ø25 mm pipe and a 1" thread for Ø32 mm pipe.
Can a PN25 PPR female adaptor be used on radiator connections in a central heating system that runs at high flow temperatures?: Yes, the PN25 PPR female adaptor can be used in central heating, with an operating temperature of 70 °C and a maximum of 95 °C. It complies with EN ISO 15874-3. The allowable pressure falls as temperature rises, so check the pressure at your system temperature in the technical data sheet.

Range

6 sizes · 3 colours

Size	In a box	White	Grey	Green Brass
Ø20x1/2"✓ White✓ Grey✓ Green Brass	200 pcs	✓	✓	✓
Ø20x3/4"✓ White✓ Grey✓ Green Brass	—	✓	✓	✓
Ø25x1/2"✓ White✓ Grey✓ Green Brass	160 pcs	✓	✓	✓
Ø25x3/4"✓ White✓ Grey✓ Green Brass	160 pcs	✓	✓	✓
Ø32x3/4"✓ White✓ Grey✓ Green Brass	90 pcs	✓	✓	✓
Ø32x1"✓ White✓ Grey✓ Green Brass	90 pcs	✓	✓	✓

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This product is listed under PPR Fittings With Brass.

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