Hitze Insights
Piping & Heating Technical Guides
Specification, certification and sourcing guides for wholesalers, contractors and private-label brands — written from the Hitze engineering desk.
Latest research
Latest technical guides
Plastic Pipe System Design Checklist: 30 Go/No-Go Questions Before You Specify
Thirty rows, six sections, four fields each: the decision, the pass condition, the no-go trigger, and the clause or guide that settles…
Read guide →
Acoustic Insulation for PPR Heating Pipes: What to Spec
DIN 4109-1 caps pipe noise at 30 dB next door, and German law already fixes the lagging thickness. What to specify on…
Read guide →
PPR Fitting Equivalent Length Table: Pressure-Drop Allowances for Elbows, Tees and Reducers
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 →
PPR Hot Water Recirculation: Sizing the Return Loop
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 →
Plastic Pipe Storage Guidelines: Limits by Material
Plastic pipe storage guidelines by material: 3 months for non-black PP-R, cover PVC before 12 months, stack heights, bearers and the 10%…
Read guide →
PPR Pipe Insulation Heat Loss: Calculate Thickness for Hot and Chilled Lines
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 →
PPR Pipe Colour Coding by Market: Grey, Green, White and What Each Standard Requires
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: What the Standards Cover
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 →
PPR Pipe Manufacturing Process: What Each Station Controls
The five stations of PP-R pipe production, each paired with the ISO 15874-2 clause it must satisfy: resin, extrusion, calibration, marking, batch…
Read guide →
Can You Bend PPR Pipe? Heat, Sweep Bends and Alternatives
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 →Get Started
Request a Quote & the Cert Pack
Tell us your market, product lines and volumes — we reply with pricing, MOQ and the certification documents for your region.