Garden Watering During a Hosepipe Ban in London: Alternatives and Preparation
When Thames Water imposes a hosepipe ban, London gardeners need alternative watering methods. This guide covers water butts, drip irrigation, soaker hoses, and how to prepare your garden for drought conditions.
What a Hosepipe Ban Means in London
A hosepipe ban — formally called a temporary use ban or drought order — is a restriction imposed by Thames Water under the Water Industry Act 1991 during periods of severe drought. The ban prohibits using a hosepipe connected to a tap for garden watering, washing a private motor vehicle, or filling a domestic paddling pool. It applies to all Thames Water customers in the affected area, regardless of whether they are on a meter.
A hosepipe ban does not prohibit watering the garden by hand — using a watering can filled from any water source, including the kitchen tap, the bathroom tap, or a water butt. It does not prohibit using water collected in a water butt or rain barrel to water the garden, even if the butt is connected to a downpipe from the roof. It does not prohibit washing a car using a bucket and sponge. The restriction applies specifically to the direct use of a hosepipe connected to a mains-fed outdoor tap.
Water Butts: The Most Effective Alternative
A water butt (also called a rain barrel) collects rainwater runoff from the roof via a downpipe diverter. A standard 100-litre plastic water butt connected to a single downpipe can collect 3,000 to 5,000 litres of rainwater per year in London, based on London average rainfall of approximately 600mm per year. A single water butt will not replace a hosepipe for a large garden, but it provides a meaningful supplement for watering containers, raised beds, and borders during dry periods.
A 200-litre slimline water butt takes up minimal space against a fence or wall and can be connected to a standard 68mm downpipe using a diverter kit available from most garden centres. For larger gardens, a daisy-chain of two or three butts connected in series provides 400 to 600 litres of storage. A gravity-fed hosepipe connected to the tap at the base of the butt provides pressure sufficient for slow watering of containers and borders close to the butt.
An outdoor tap plumber can fit a water butt connector on an existing downpipe as part of an outdoor tap installation visit. We can also connect a butt overflow pipe to a soakaway or a drain to prevent overflow flooding during heavy rain.
Drip Irrigation Systems
A drip irrigation system delivers water directly to the root zone of plants through a network of small-diameter pipes and drip emitters. Drip irrigation is highly water-efficient compared to overhead watering because it places water precisely where the plant needs it, reduces evaporation losses, and avoids wetting foliage and soil surface. A well-designed drip system uses 30 to 50 percent less water than conventional overhead watering for the same result.
During a hosepipe ban, a drip system can be connected to a water butt rather than the mains tap, provided the system operates by gravity from the butt rather than via a pressurised hosepipe connected to a mains tap. Gravity-fed drip irrigation requires the butt to be elevated above ground level (a raised stand is often used) to provide sufficient head pressure to push water through the emitters.
For larger London gardens, battery-operated or mains-powered irrigation timers allow automatic garden watering at night, when evaporation losses are lower. These systems can be connected to a stored water source (water butt, tank, or borehole) rather than the mains supply, making them usable during a hosepipe ban.
Soaker Hoses
A soaker hose is a porous rubber or recycled tyre material hose that weeps water along its entire length when pressurised. Laid along the base of a border or along a row of vegetables, it delivers water directly to the root zone of plants at very low flow rates. Like drip irrigation, soaker hoses are significantly more efficient than overhead spray watering. A soaker hose connected to a water butt via a gravity-feed connection is permitted during a hosepipe ban because the hosepipe connection is from a stored non-mains source rather than directly from a mains tap.
Preparing the Garden for Drought
Mulching — applying a 5 to 8cm layer of bark chippings, composted bark, or straw over the surface of borders and around the base of shrubs — reduces soil moisture evaporation by 50 to 70 percent. A well-mulched border requires significantly less watering than bare soil during dry weather. Mulching also suppresses weeds that compete with garden plants for water and nutrients.
Improving soil structure with organic matter (composted garden waste, leaf mould, or well-rotted manure) increases the water-holding capacity of London clay soils. Clay soils hold more water than sandy soils but can become compacted and drain poorly in wet weather while cracking and drying severely during drought. Organic matter improves drainage in wet conditions and water retention in dry conditions.
If you are planning to install an outdoor tap before a potential hosepipe ban season, contact Prestige Engineers for a same-week installation. An outdoor tap with a disconnected hosepipe is fully usable during a hosepipe ban — you can fill watering cans from the tap without restriction. Contact us for outdoor tap installation across all London boroughs.