Drain Jetting Harpenden -

: Consider a preventative jetting service every 12–24 months for older properties.

| Action | Frequency | Why in Harpenden | |--------|-----------|-------------------| | Enzyme drain treatment (e.g., monthly) | Monthly | Slows fat & limescale build-up from hard water | | Root treatment (copper sulphate) | Annually | Reduces re-growth in clay pipes near trees | | CCTV re-inspection | Every 2-3 years | Detects pipe movement from clay shrinkage | | Gully cleaning | Autumn | Prevents leaf mulch + silt entering system | drain jetting harpenden

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In Harpenden, drain jetting must comply with: : Consider a preventative jetting service every 12–24