Plumbing
PPR pipe and fittings
Polymelt PP-R and PP-RCT pipe and fittings, Germany.
In a PPR installation, pipe and fittings are joined by heat: at the joint the pipe and the fitting melt together and, once cool, become one piece. With no seal and no adhesive in it, this joint is the most reliable way to keep hot- and cold-water lines watertight. AY BUILDING supplies PP-R and PP-RCT pipe and fittings from the German manufacturer Polymelt.
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Pipe
Pipe made of PP-R or PP-RCT. The pressure class (SDR) sets the wall thickness: at the same outer diameter, a lower SDR means a thicker wall and a higher pressure rating.
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Fitting
Couplings, elbows, tees and adaptors. The pipe end goes into the fitting's socket.
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Fusion joint
Pipe end and socket are heated at the same time on the welding tool and pushed together. Once cool, pipe and fitting are one material, with no seal or adhesive between them. The bead that forms at the socket mouth shows the weld is complete.
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Wall thickness
At the same outer diameter, the wall thickness changes with the pressure class. Sizes from Ø20 mm to Ø125 mm are in the table below.
Installation
The pipes are cut square and clean. The pipe end and the fitting's socket are heated together on the welding tool, joined straight away and left to cool without being moved. The finished line is pressure-tested; on hot-water lines, room is left for the pipe's thermal expansion.
Published figures
As published by the manufacturer. The profile and glass sections for a given project are set by structural calculation.
ECOSAN PP-R pipe range
| Class | S | Material | Ø range |
|---|---|---|---|
| SDR 6 | S 2.5 | PP-R | 20–125 |
| SDR 7.4 | S 3.2 | PP-R | 20–125 |
| SDR 9 | S 4 | PP-RCT | 25–125 |
| SDR 11 | S 5 | PP-R | 20–125 |
| ML5 SDR 7.4 | S 3.2 | PP-R / PP-RCT | 20–250 |
Outer Ø · Wall
| Outer Ø | Wall | Inner Ø | DN |
|---|---|---|---|
| 20 | 2.8 | 14.4 | 12 |
| 25 | 3.5 | 18 | 20 |
| 32 | 4.4 | 23.2 | 25 |
| 40 | 5.5 | 29 | 32 |
| 50 | 6.9 | 36.2 | 40 |
| 63 | 8.6 | 45.8 | 50 |
| 75 | 10.3 | 54.4 | 50 |
| 90 | 12.3 | 65.4 | 65 |
| 110 | 15.1 | 79.8 | 80 |
| 125 | 17.1 | 90.8 | 100 |
polymelt.com — ECOSAN PP-R / PP-RCT, 2026-09-02
Where it is used
- Domestic hot- and cold-water systems
- Hotel and hospital water lines
- Heating systems
- Industrial water lines
When to choose it
For hot- and cold-water lines where corrosion and scale are to be avoided. PP-RCT is used for higher temperatures and pressures, PP-R for standard lines.
Request a quote
Send dimensions, drawings or a bill of quantities, and we will come back with a written specification and a quote.