How much does it cost to fit an outside tap in the UK?
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A standard outside tap supply and installation costs £100–£250. This includes a bib tap, the connection to the nearest cold supply inside, a hole drilled through the wall, and a backflow prevention (check valve) — which is a Water Regulations requirement.
The main cost variable is the pipe run inside the house. If the outside wall is close to the kitchen cold supply, the job is straightforward (1–2 hours). If the pipe needs to run further — e.g. the other side of the house — add £50–£150 for extra materials and time.
A non-return (check valve) is required by UK Water Regulations to prevent garden hose water from back-siphoning into the drinking water supply. Any reputable plumber will fit one automatically — if they do not mention it, ask.
A frost-protection tap (also called a hosepipe tap with drain-back feature) is worth specifying if the pipe run inside is long or in an unheated space. These empty the pipe when the tap is turned off, preventing freezing. They cost £20–£40 extra.
This is a job many competent DIYers tackle themselves. You need a masonry drill, copper or plastic pipe, compression or push-fit fittings, and a bib tap. Our guide to fitting an outside tap covers the full process.
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