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Drainage Tools

Written for Canada. Plans are metric, but many crews and suppliers work in feet and inches, so this site gives both: millimetres and metres, with feet and inches beside them. Codes are the National Building Code of Canada 2020 (NBC 2020) Part 9 as your province adopts it. A number marked Confirm has not been checked against every province, so check it with your own authority before you act on it.

Reviewed by a working tradesman with 17+ years in the field.

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Drainage tools set the pipe and the bed. Slope, clean gravel and a lawful outlet decide whether it works.

I am a:

Tap your level and the boxes below open to the advice for you. Remembered on this device.

What it isThe tools that dig the trench, set the pipe, build the gravel bed and wrap it with fabric.
Your jobGet the slope, clean gravel and a lawful outlet right. The tools just have to do those jobs well.
The hard ruleKeep trench sides sloped or shored and keep electrical tools out of standing water.
The checkPipe size and slope, gravel, fabric and outlet, before backfill.

By the end you can

  • Name the tools for trenching, pipe, gravel beds, fabric and pumping.
  • Choose a pipe joining method.
  • Say where drainage code rules sit and who sets discharge.
  • Spot the wet trench hazards.
Stop and read

A trench full of water is a collapse and electrical risk. Keep the sides sloped or shored, and keep electrical tools and cords out of standing water (GFCI). See Trench Safety.

Solvent cement gives off fumes. Ventilate and follow the product sheet.

The big idea

Drainage tools dig the trench, set the pipe, build the gravel bed and protect it with fabric. Good drainage depends on slope, clean gravel and a proper outlet. Pipe size, slope, gravel and outlet requirements are in Part 9, Section 9.14 of the National Building Code (see Drain Tile and Discharge Lines for what I verified), and discharge is set by municipal bylaws.

Trenching, pipe and drain bed tools

  • Trenching: trench shovel and drain spade for narrow, deeper digging; digging bar, pick and mattock for hard ground and roots; a hand or power trencher for long runs; a mini-excavator for deep or wide trenches.
  • Pipe: pipe cutter, PVC saw and hacksaw cut cleanly; a deburring tool removes burrs; fitting tools and solvent cement (with the primer and cement made for the pipe type, ventilated) make solid joints; a crimp tool and fittings join corrugated pipe.
  • Drain bed: gravel rake and landscape rake level the bed; a slope guide, laser or level checks the fall; a hand tamper or light plate compactor settles the gravel without damaging the pipe.
  • Filter fabric: utility knife and fabric shears cut the geotextile; a staple gun and pins hold it until it is wrapped.
  • Pumps: a trench or submersible pump keeps the excavation dry, and hose and fittings carry water to a lawful place, not onto a neighbour or into a watercourse.

Example (numbers made up). A drain run 30 m (98 ft 5 in) long with a fall of 1 in 100 drops 30 × 0.01 = 0.30 m (11 3/4 in). Confirm the minimum slope in your provincial code or on the drawings.

Power sources and weather

  • Corded electric: use GFCI protection on the supply, extension cords and pumps, especially in wet trenches. Confirm your provincial OHS electrical rules.
  • Battery: loses power in cold and can overheat in hot sun.
  • Gas and diesel: give off carbon monoxide, so never run them in a trench without ventilation.

Weather: heat means water, shade and light tools; in the cold protect hoses and pumps from freezing and wear insulated gloves; in rain use pumps, mud boots and GFCI; clear snow and ice from the trench area; in wind protect the fabric from lifting.

Common mistakes

  • Unsafe trench sides
  • Dirty gravel or no fabric
  • Pipe with no slope or the wrong slope
  • Heavy compaction on the pipe
  • No outlet or an unlawful outlet
  • Corded tools in standing water
Pro note

The pipe is only as good as its slope, its bed and its outlet. Photograph the pipe, gravel and fabric before you backfill.

Weather note

Rain fills trenches and softens the sides. Frost can freeze pumps and hoses. Plan pumping and trench safety for the weather.

What the inspector or safety officer looks at

Pipe, slope, gravel, fabric and outlet before backfill, and trench sides and pumping. Confirm what your authority checks.

✅ Check yourselfTap a question
What goes wrong in a trench full of water?
Collapse and electrical risks. Keep sides sloped or shored, and keep electrical tools and cords out of standing water (GFCI).
Where do drain pipe size, slope, gravel and outlet requirements sit in the National Building Code?
Section 9.14 of Part 9 (see Drain Tile and Discharge Lines for what I verified). Discharge is also set by municipal bylaws, and your province adopts its own edition.
Why not use a heavy compactor on the gravel bed around the pipe?
It can crush or shift the pipe. Use a hand tamper or a light plate compactor.
Where should pumped trench water go?
To a lawful place, not onto a neighbour or into a watercourse.
A drain run is 30 m (98 ft 5 in) long with a fall of 1 in 100 (1 cm per m). How much total fall?
30 × 0.01 = 0.30 m (11 3/4 in). Numbers are made up. Confirm the minimum slope in your provincial code or on the drawings.
What do you do about solvent cement fumes?
Ventilate, use the primer and cement made for the pipe type, and wear a respirator or use ventilation as the product sheet says.
🧰 Gear for this stepMust-haveRent itNice to have
  • Must-haveTrenching:
  • Must-havePipe:
  • Must-haveDrain bed:
  • Rent itLight plate compactor for the gravel bed (not on the pipe)
  • Must-haveFilter fabric:
  • Rent itPumps: trench or submersible pump with hose and fittings
  • Must-haveElectrical: GFCI protection on every corded tool and pump
  • Must-havePPE:
🛒 Buy, rent or borrow?Tap your level
Home DIY
Rent a trench pump and a small plate compactor, and buy hand tools, pipe cutter, gloves, glasses and a respirator for solvent cement. Do not dig deeper than 1.2 m (4 ft) and never enter a trench the sides of which are not sloped or supported. Hire an operator for an excavator and get a plumber or drainage contractor for anything that connects to a sewer or storm main.
Laborer or helper
Dig, rake gravel, cut fabric and carry pipe under direction. Keep out of any trench that has not been cleared, keep cords and tools out of standing water, and tell the lead about any water, cracks or slumping at the sides.
1st-year apprentice
Cut pipe, glue fittings in ventilated areas, set slope with a laser or level, and wrap fabric under supervision. Learn the minimum slope on your drawings and why clean gravel matters.
Apprentice, 2nd to 4th year
Lay pipe to the drawings, check slope as you go, build the gravel bed and wrap the fabric. Pump out trenches safely with GFCI protection, and send water to a lawful place.
Journeyperson
You own trench condition, pipe and bed layout, slope, fabric and outlet, and decide when to stop for water or unstable sides. Check the discharge point against bylaws and the drawings.
Lead hand or foreman
Check pipe, slope, gravel, fabric and outlet against the drawings before backfill, and make sure trench safety and pumping are managed.
Contractor or business owner
Price trenching, pipe and fittings, gravel, fabric, pumping and the discharge connection as separate lines. Keep photos of the pipe and bed before backfill, and ask your insurer who carries the cost of a drain that fails.
Starting a new business
Learn your municipality's discharge bylaws, your province's trench rules and the plumbing or drainage permits you need before you quote. Confirm insurance and workers' compensation coverage.
By Province:

Drainage code requirements follow the edition of the National Building Code your province adopts, discharge is set by your municipality, and trench rules are set by your province's OHS regulation (see Trench Safety). I dropped the old per-province references because I could not verify them. Confirm with your building department and municipality.

See Canada by Province for the full comparison.

Sources:
  • Drain pipe, gravel and outlet requirements are covered with sources in the Drain Tile, Gravel Beds and Discharge Lines lessons in this book. Trench hazards are covered in Trench Safety.
  • Minimum slope, municipal discharge bylaws and provincial electrical rules were not verified here. Tool descriptions are general trade practice.

Last reviewed October 2026. General information, not engineering or legal advice.

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