Hitze Insights
Category starting point
Use these permanent system guides first; the latest articles below answer narrower project questions.
What is PPR pipe? Understand PP-R materials, fusion, standards, sizes, ratings, potable-water checks, installation and project selection.
Latest in this category
PPR fitting equivalent length is not one number. Convert published zeta values into metres of PP-R, design case stated, and see what…
Read guide →
Size a PP-R hot water recirculation loop: the DVGW W 551 5 K duty, heat loss to flow, real PP-R bores, and…
Read guide →
PPR pipe insulation heat loss worked to EN ISO 12241: W/m by thickness for a 60 °C line, the dew-point thickness for…
Read guide →
There is no colour code for PPR pipe. ISO 15874-2:2013 lists eight marking items and colour is not one. What to specify…
Read guide →
PPR pipe UV resistance is a maker's claim, not a standard requirement: ISO 15874 scopes PP-R to installations within buildings. The clauses…
Read guide →
Can you bend PPR pipe? Only as a long deflection: 100 x OD per Aquatherm, no published heat-bending method, and ISO 15874-2…
Read guide →
Does PPR pipe need insulation? Yes on hot and chilled runs, and on German cold lines since 1 Jan 2024. Thicknesses from…
Read guide →
If you are asking how to connect PVC pipe to PPR pipe, you have almost certainly already tried the obvious thing and…
Read guide →
Fiber reinforced PPR pipe falls under ISO 21003, not ISO 15874 — and 0.035 mm/m·K is a published minimum, not a property.…
Read guide →
ISO 15874 separates a PP-R material defect from a bad weld. A step-by-step evidence procedure for importers and distributors facing a joint…
Read guide →Get Started
Tell us your market, product lines and volumes — we reply with pricing, MOQ and the certification documents for your region.
