NAS Certification for
Drain & Drainage Businesses.
Drain clearance and drainage contractors working for housing associations, FM companies, and NHS trusts must demonstrate robust compliance — particularly around COSHH, Environmental Protection, and confined space working. NAS provides the independently assessed credentials your clients require.
Why Drain Clearance Businesses Need NAS Certification
Drain clearance contractors handle hazardous substances, work in confined spaces, and manage environmental risks — making compliance scrutiny from housing associations and FM clients particularly rigorous. NAS provides the independent certification that demonstrates your business operates to a defined UK standard.
NAS Basic — £349/yr
Health & Safety evidence certification. Ideal for sole traders and small businesses.
NAS Bronze — £749/yr
Core compliance certification covering legal, insurance, GDPR and operational checks.
NAS Silver — £950/yr
Enhanced compliance including Modern Slavery, Bribery Act, environmental and governance review.
NAS Gold — £1,150/yr
22 compliance areas. Covers Public Contracts Regs, Building Regulations, Environmental Act and more.
What You Get With NAS Certification
Certification goes beyond a certificate — it opens doors and gives you tools to grow.
Public Register Listing
Housing and FM buyers verify your NAS drainage certification on the free NAS register.
Drainage & FM Tenders
Access live drainage and reactive maintenance tender opportunities in housing and FM sectors.
COSHH & Waste Templates
COSHH assessments for drain chemicals, confined space procedure templates, and waste disposal documentation.
Compliance Hub
Centralise your drainage compliance documents, waste carrier licences, and insurance records.
Licence & Insurance Alerts
Alerts for waste carrier licence, insurance, and COSHH assessment renewals.
Confined Space & COSHH Training
CORE training modules covering confined space awareness, COSHH, and drainage-relevant compliance.
Frequently Asked Questions
Refer Work & Win More Jobs as a Drainage Contractor
NAS TradeLink is exclusively available to NAS-certified contractors. Refer overflow work to trusted peers, receive matched opportunities in your trade and area, and build a verified partner network — all within the NAS platform.