Technical Library 11 guides
Hot-and-cold water PPR pipe, fittings and valves — specification, welding, pressure classes and system design.
PPR Systems · 30 May 2026
Sun-bleached, bowed or bruised pipe fails tests that get blamed on the welder. Stack heights, support spacing, UV limits, cold-weather handling and a two-minute goods-in inspection.
Read the guidePPR Systems · 14 May 2026
Static head adds about 1 bar per 10 metres, so a tower riser is a different problem. How to calculate zone height rather than guess it, PN class by zone, thermal expansion by reinforcement type, fire-stopping and submittal content.
Read the guidePPR Systems · 13 May 2026
PPR pressure drops under test even with no leak — that is the material, not a fault. Test pressures, staging, hold times, permitted drop, and how to read a falling gauge correctly.
Read the guidePPR Systems · 9 May 2026
PPR sags between brackets and grows lengthwise when hot. Support spacing by diameter and water temperature, fixed points versus sliding clips, and how to absorb thermal expansion.
Read the guidePPR Systems · 9 May 2026
PPR moves roughly an order of magnitude more than metal for the same temperature rise. A movement table by run length and temperature, the formula for sizing an expansion loop with a worked example, and where fixed and sliding supports belong.
Read the guidePPR Systems · 5 May 2026
PPR does not leak on its own — it leaks where a weld was rushed, a hot line was clamped rigid, or parts came from two suppliers. Ten field errors, with a symptom-to-cause diagnostic table.
Read the guidePPR Systems · 2 May 2026
Two quotes for the same PPR pipe can differ by 30%. The cost stack behind a PPR pipe price, the arithmetic for the metre weight a spec implies, and how to compare per kilogram without rewarding a thin wall.
Read the guidePPR Systems · 30 Apr 2026
Die range, thermal recovery, temperature control and die coating decide whether a socket-fusion machine holds up. How to size one to your diameters, plus a comparison by capacity class.
Read the guidePPR Systems · 28 Apr 2026
Socket, brass-insert, union or stop valve? How to pick a PPR ball valve for a hot line — the body types, full versus reduced bore, and the PN and SDR class table behind temperature derating.
Read the guidePPR Systems · 18 Apr 2026
PN is a nominal rating at 20 °C, not a site working pressure. What PN10 to PN25 mean, the pipe series and SDR behind each class, the ISO 10508 application classes, and how to choose.
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Own extrusion, injection-moulding and machining lines. No MOQ. Standard lead time 45 days. Response within one working day.