Overview
ISO 7675:2003 specifies requirements for plastics piping systems made from chlorinated poly(vinyl chloride) (PVC‑C) used for soil and waste discharge (low and high temperature) inside buildings. The standard covers pipes, fittings and complete systems intended for internal drainage, ventilation and rainwater conveyance inside buildings. It applies to non‑buried installations and to components joined by elastomeric sealing rings, solvent cementing or integral dual‑purpose sockets (ring‑seal and/or solvent cement joints). ISO 7675 also defines test parameters for verification of material, geometric, mechanical and performance requirements.
Key topics and technical requirements
- Material composition: PVC‑C compound requirements, allowance for up to 50% PVC‑U blending and permitted reprocessable material from production.
- Geometrical characteristics: dimensional requirements and measurement methods (referenced to ISO 3126), including mean outside diameters, effective pipe lengths, socket classifications (short, normal, long) and chamfering/pipe‑end finishing.
- Wall thickness and fittings: minimum and maximum wall thickness ranges, allowances for manufacturing variations and special considerations for fabricated fittings and transitional adapters.
- Mechanical and physical characteristics: provisions for impact, thermal and ageing behaviour, and resistance to elevated temperature cycling (test methods referenced).
- Sealing and jointing: requirements for sealing rings, retaining means and solvent adhesives, plus airtightness and watertightness test methods.
- Performance, marking and installation: system performance testing, mandatory marking information and guidance for on‑site installation practices.
Practical applications and users
ISO 7675 is intended for practical use by:
- Manufacturers of PVC‑C pipes and fittings to design and certify products for internal soil, waste and rainwater systems.
- Plumbing and building services engineers specifying compliant drainage and ventilation systems for residential, commercial and institutional buildings.
- Installers and contractors who assemble piping systems using ring seals or solvent cement joints.
- Test laboratories and conformity assessors performing standardized tests on geometry, mechanical and performance properties.
- Regulators and specifiers referencing harmonized requirements for building drainage where buried pipework is not involved.
Typical applications: internal soil and waste discharge stacks, sanitary drainage, associated ventilation runs and internal rainwater downpipes where higher temperature resistance and chemical stability of PVC‑C are required.
Related standards
- EN 1566‑1 (application area code “B” compatibility)
- ISO 3126 (dimensional measurement)
- EN 1053 / EN 1054 / EN 1055 (test methods for watertightness, airtightness, temperature cycling)
- EN 681 series (elastomeric seals)
Keywords: ISO 7675, PVC‑C piping, plastics piping systems, soil and waste discharge, building drainage, ring‑seal joints, solvent cement, socket dimensions, pipe wall thickness.
Open preview (PDF)Plastics piping systems for soil and waste discharge (low and high temperature) inside buildings — Chlorinated poly(vinyl chloride) (PVC-C)
