GF+ Aquasystem PP-R Male Threaded Transition Union with Loose Nut (Hexagon)
GF+ Aquasystem PP-R Male Threaded Transition Union with Loose Nut (Hexagon) — A transition union consisting of a PP-R body welded to the pipe, a loose nut and a brass male-threaded end. Because the nut turns independently, the connection is made without rotating the equipment or the pipe, and it can be removed when needed without cutting the line.
Applications
- Female-threaded valve, pump and meter connections
- Equipment that must be removed for maintenance
- Manifold and boiler room
Key features
- Loose nut: connects without rotating the line
- Nickel-plated brass male thread (BSPP-G)
- Ø20 – Ø63 mm, PN25
Technical specifications
| Property | Value |
|---|---|
| Series | GF+ Aquasystem (Georg Fischer Piping Systems) |
| GF product description | AQUASYSTEM Transition Joint Hexagonal Male BSPP-G PP-R |
| Body material | PP-R (polypropylene random copolymer, type 3) |
| Threaded insert | Nickel-plated brass, BSPP-G (ISO 228) thread |
| Pressure rating (GF data) | PN25 |
| Jointing | Socket fusion welding — no seals or compression parts |
| Color | White |
| Application | Cold and hot drinking water, heating systems |
| Standards | Pipe: DIN 8077/8078, EN ISO 15874 · Fittings: DIN 16962, EN ISO 15874 |
Dimensions
| Size | Product code | d | DN | G | PN | D | L1 | LB |
|---|---|---|---|---|---|---|---|---|
| 20 mm - 1/2″ | 4300902004021 | 19.2 | 20 | 1∕2 | 25 | 25.2 | 15.4 | 52.6 |
| 20 mm - 3/4″ | 4300902004121 | 19.2 | 20 | 3∕4 | 25 | 25.2 | 15.4 | 56.1 |
| 25 mm - 3/4″ | 4300902504321 | 24.3 | 25 | 3∕4 | 25 | 32.8 | 18.5 | 59.1 |
| 32 mm - 1″ | 4300903204521 | 31.2 | 32 | 1 | 25 | 39.9 | 20.5 | 65.1 |
| 40 mm - 1 1/4″ | 4300904005321 | 39.0 | 40 | 1 1∕4 | 25 | 49.7 | 23.9 | 76.5 |
| 50 mm - 1 1/2″ | 4300905005421 | 48.9 | 50 | 1 1∕2 | 25 | 57.9 | 24.0 | 79.3 |
| 63 mm - 2″ | 4300906305521 | 61.9 | 63 | 2 | 25 | 73.6 | 27.5 | 82.0 |
d: pipe outside diameter (mm) · DN: nominal size · G: thread size (inch, BSPP – ISO 228) · PN: nominal pressure (bar, 20 °C) · D: body outside diameter (mm) · L1: socket depth (mm) · LB: overall length (mm). Dimensions from the GF Piping Systems data sheet; the technical drawing in the product images shows where each dimension applies.
Socket fusion welding times
| Pipe diameter | Welding depth (mm) | Heating (s) | Joining time (s) | Cooling (min) |
|---|---|---|---|---|
| Ø20 | 14 | 5 | 4 | 2 |
| Ø25 | 15 | 7 | 4 | 2 |
| Ø32 | 16.5 | 8 | 6 | 4 |
| Ø40 | 18 | 12 | 6 | 4 |
| Ø50 | 20 | 18 | 6 | 4 |
| Ø63 | 24 | 24 | 8 | 6 |
Values per DVS 2207-11 at +20 °C ambient and 260 °C heating tool temperature. Below +5 °C, extend the heating time by about 50%. Heating time starts when pipe and fitting are fully seated on the heating dies; during the joining time the parts may be aligned axially without twisting.
Installation tips
- Cut the pipe square with a pipe cutter and mark the welding depth on the pipe.
- Push pipe and fitting onto the heating dies at the same time without twisting; when the heating time is over, join them quickly and axially.
- Do not twist the parts after the joining time; do not pressurize the line before the cooling time has passed.
- When tightening a threaded joint, hold the brass part with a wrench; do not apply torque to the PP-R body. Use hemp or sealing tape on the thread.
- Pressure-test the installation before closing walls or screed.
Frequently asked questions
What is the advantage of the loose nut?
The connection can be made while the mating equipment stays fixed, and it can be removed when needed without cutting the line.
Used together in the Aquasystem system
PP-R Standard Pipe SDR6 · PP-R Fiberglass Reinforced (Faser) Pipe · PP-R Welding Kit · PP-R Welding Dies · PP-R Pipe Cutter · PP-R Elbow 90°
About the brand
Aquasystem is the PP-R piping system of Swiss-based Georg Fischer (GF) Piping Systems: pipes, fittings, valves and welding tools made to work together and joined with the same welding method. Novus Energy supplies all GF+ Aquasystem components for projects worldwide, shipped from Istanbul.