What is the difference between a frost-free and standard outdoor tap in Calgary?

Standard sill cock (non-frost-free): the shutoff valve and seat are located just inside the exterior wall or right at the wall face. When temperatures drop below freezing, the water in the spout and the tap body outside the wall freezes — expanding and cracking the tap body or the copper pipe behind it. This is the original outdoor tap type and should always be winterized (shut off at the interior stop valve and drained) before Calgary's first freeze. Frost-free sill cock (anti-siphon): the shutoff valve and seat are located 20–30 cm inside the wall, in the conditioned space of the house. When the tap is turned off, the water column drains back toward the interior shutoff rather than remaining in the exposed exterior section. This eliminates the freeze risk — provided the tap is turned fully off, nothing is attached to the spout (a hose left connected prevents drainage), and the tap pitches slightly downward toward the outside. Most Calgary homes built after 1995 have frost-free sill cocks, but a hose left connected in October defeats the self-draining mechanism entirely.

How do I winterize an outdoor tap in Calgary?

Winterizing an outdoor tap in Calgary: (1) Disconnect any hose from the spout — a connected hose traps water in the frost-free section and causes freezing even on frost-free models. (2) Locate the interior shutoff valve for the outdoor tap — typically in the basement on the cold water supply, a separate stop valve just for the exterior tap. (3) Turn the interior shutoff valve fully off. (4) Go outside and open the outdoor tap to drain any remaining water from the pipe between the shutoff valve and the spout. Leave the tap open until water stops draining (usually 10–30 seconds). (5) Close the outdoor tap. On a frost-free model: disconnect the hose (step 1) and ensure the tap is fully closed. The frost-free mechanism handles the rest. Do NOT leave the frost-free tap slightly open — it must be fully closed for the drain-back to work. Complete winterizing before Calgary's first overnight freeze — typically late September to mid-October.

How do I know if my outdoor tap in Calgary has burst from freezing?

Signs of a burst outdoor tap or frozen pipe in a Calgary home: (1) The outdoor tap drips constantly when turned off in spring — the tap body has cracked and is leaking internally. (2) Water appears on the interior wall or basement ceiling below the outdoor tap location when the tap is opened in spring — the supply pipe behind the wall has burst. (3) The tap turns freely but no water comes out when opened — the pipe behind the wall may be blocked or burst and collapsed. (4) A visible bulge or crack in the tap body itself. (5) Water pressure fluctuates or drops when the outdoor tap is open. If any of these signs appear, shut off the interior stop valve for that tap immediately and do not use the outdoor tap until it has been assessed and repaired.

Can a handyman replace an outdoor tap in Calgary?

A handyman can replace a like-for-like outdoor tap (sill cock) at the same location if the supply pipe behind the wall is accessible and in good condition. The work involves: shutting off the interior stop valve, disconnecting the old tap, installing the new frost-free sill cock with proper pitch (slightly downward toward exterior), and reconnecting to the supply pipe. If the supply pipe behind the wall has burst (not just the tap body), the repair involves opening the wall to access and replace the copper or PEX pipe — still handyman scope if the run is short and accessible, but a plumber is recommended for longer pipe runs or if the shutoff valve itself has failed.

What does outdoor tap replacement or winterizing service cost in Calgary?

Outdoor tap service costs in Calgary: annual winterizing (shutoff + drain, included in fall maintenance visit) — no separate charge when combined with other fall tasks. Frost-free sill cock replacement (like-for-like, accessible location) — from $95 including the new tap. Interior stop valve replacement (if seized) — from $85, or refer to a licensed plumber if the main shutoff is required. Burst pipe repair (short accessible run) — from $145. If the wall needs to be opened to access the burst pipe — from $250 (including drywall patch).

Outdoor Tap Winterizing Calgary

Frost-free vs. standard sill cock — Calgary comparison

Feature	Standard sill cock	Frost-free sill cock
Valve seat location	At or near exterior wall face	20–30 cm inside wall (conditioned space)
Self-draining	No — requires manual winterizing	Yes — drains when tap is off and hose disconnected
Calgary freeze risk	High — freezes at first hard frost if not winterized	Low — only if hose is left connected
Requires interior shutoff valve	Yes — essential for winterizing	No — but useful as backup
Cost to replace (installed)	From $75	From $95
Homes built before 1995	Common	Rare
Homes built after 1995	Uncommon	Standard

The #1 frost-free tap failure: hose left connected

A frost-free sill cock is designed to drain back when the tap is closed. The water column between the exterior spout and the interior valve seat drains toward the outside when the tap is off — but only if the spout is unobstructed. A garden hose left connected after Thanksgiving traps that water column. When temperatures drop to -10°C or below, the trapped water freezes and expands inside the frost-free stem — cracking the same section of the tap that the frost-free design was meant to protect.

The rule for every Calgary home: disconnect garden hoses before the first overnight freeze (late September to mid-October). This one habit prevents the most common outdoor tap failure in the city.

5-step winterizing procedure for a standard outdoor tap

Disconnect the hose from the spout
Find the interior shutoff valve for the outdoor tap (usually in the basement, a dedicated stop valve on the cold water supply)
Turn the interior shutoff valve fully off
Go outside and open the outdoor tap — drain until water stops flowing (10–30 seconds)
Leave the outdoor tap open slightly through the winter to allow any residual moisture to evaporate

Signs of a burst outdoor tap in Calgary

Tap drips when turned fully off in spring — internal crack in the tap body
Water appears on interior wall or basement ceiling when the tap is opened — supply pipe has burst behind the wall
Tap turns freely but no water flows — pipe behind wall may be collapsed from the burst
Visible bulge or crack in the tap body outside

If any of these signs appear, shut the interior stop valve immediately and do not use the outdoor tap until it is assessed.

Outdoor tap repair and replacement costs in Calgary

Scope	Starting price
Frost-free sill cock replacement (accessible location)	From $95 including new tap
Interior stop valve replacement (if seized)	From $85
Burst pipe repair (short accessible run)	From $145
Burst pipe + drywall patch (wall access required)	From $250

Fall home maintenance in Calgary

Outdoor tap winterizing, weatherstripping check, caulk inspection, and gutter clear — all in one fall maintenance visit before the cold arrives.

View home maintenance service →Book a fall maintenance visit

Steve serves all Calgary areas