The 6 Best Drainage & Sewage in Cardiff 2026

Ranked by real customer reviews, listing activity and Companies House verification. Updated weekly from public sources.

How this ranking is calculated

Composite score from real, publicly-verifiable signals only:

  • Google Business Profile star rating (when 3+ reviews)
  • Google Business Profile review count (log-scaled)
  • Verification sources: Companies House number, Google Business listing, Checkatrade, TrustATrader, claimed website
  • Operator-claimed listing status

No paid placement. No accepted listings. No fabricated reviews. Source data refreshed weekly.

  1. Drainmen Ltd is a drainage specialist in Cardiff, rated 5/5 from 123 Google reviews. Registered with Companies House (no. 04819743) and currently active. Established Google Business Profile with 123+ customer reviews.

    5.0★ (123 reviews)3 verification sources
    5.0★
    123 reviews

  2. City Drains is a drainage specialist in Cardiff, rated 5/5 from 313 Google reviews. Registered with Companies House (no. 15501578) and currently active. Established Google Business Profile with 313+ customer reviews.

    5.0★ (313 reviews)3 verification sources
    5.0★
    313 reviews

  3. M Thomas Water Services Ltd is a drainage specialist in Cardiff, rated 4.7/5 from 12 Google reviews. Registered with Companies House (no. 04034298) and currently active. Verified Google Business Profile.

    4.7★ (12 reviews)3 verification sources
    4.7★
    12 reviews

  4. Cardiff Drain Cleaning Company is a drainage specialist in Cardiff, rated 3.1/5 from 8 Google reviews. Registered with Companies House (no. 04845253) and currently active.

    3 verification sources
    3.1★
    8 reviews

  5. Clark Drainage is a drainage specialist in Cardiff, Wales. Registered with Companies House (no. 08295688) and currently active.

    3 verification sources
  6. Companies House registered

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