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PP-R Systems

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PP-R Systems pillar guides

Use these permanent system guides first; the latest articles below answer narrower project questions.

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Technical articles and updates

Polypropylene Pipe on a US Spec: Separate Material and Duty
PP-R Systems

Polypropylene Pipe on a US Spec: Separate Material and Duty

Specify polypropylene pipe by service, material and joining system. Separate pressure-water evidence from non-pressure corrosive-waste requirements.

October 7, 2026 · 7 min read
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Pipe Sleeves Through Walls and Slabs: Sizing for Thermal Movement on Plastic Pipe (Not Firestopping)
PP-R Systems

Pipe Sleeves Through Walls and Slabs: Sizing for Thermal Movement on Plastic Pipe (Not Firestopping)

Size a sleeve for PP-R and plastic pipe: code and spec clearances (IPC 305.3, NJ 2.12, MasterSpec 220517), wall movement, insulation, the…

September 29, 2026 · 11 min read
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Schedule, SDR or PN? Reading Wall Thickness Across Steel, PVC and PP-R Specifications
PP-R Systems

Schedule, SDR or PN? Reading Wall Thickness Across Steel, PVC and PP-R Specifications

A schedule fixes one wall per pipe size; an SDR fixes the OD-to-wall ratio; PN sets no wall. Figures from ASME B36.10-2022,…

September 27, 2026 · 11 min read
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PP-R to HDPE: The 3 Transitions and the One You Can’t Fuse
PP-R Systems

PP-R to HDPE: The 3 Transitions and the One You Can’t Fuse

PP-R cannot be fused to HDPE. The three permitted transitions by size band, the bolt torque and re-torque rules, and what to…

September 23, 2026 · 20 min read
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Plastic Pipe System Design Checklist: 30 Go/No-Go Questions Before You Specify
PP-R Systems

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…

September 19, 2026 · 16 min read
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Acoustic Insulation for PPR Heating Pipes: What to Spec
PP-R Systems

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…

September 18, 2026 · 12 min read
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PPR Fitting Equivalent Length Table: Pressure-Drop Allowances for Elbows, Tees and Reducers
PP-R Systems

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…

September 16, 2026 · 12 min read
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PPR Hot Water Recirculation: Sizing the Return Loop
PP-R Systems

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…

September 13, 2026 · 20 min read
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PPR Pipe Insulation Heat Loss: Calculate Thickness for Hot and Chilled Lines
PP-R Systems

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…

September 12, 2026 · 14 min read
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PPR Pipe Colour Coding by Market: Grey, Green, White and What Each Standard Requires
PP-R Systems

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…

September 10, 2026 · 12 min read
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