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Wi-Fi water leak detector buying guide

Updated: 16 October 2026

You are about to pay for a sensor because a washing-machine hose, a sink trap or a loft tank has already made you nervous. A Wi-Fi water leak detector buying guide, for the seven amazon.co.uk listings captured on 15 October 2026, is a checklist of connection, siren, cable, IP claim and battery text. It is not a valve and it does not crown a winner. The [Wi-Fi water leak alarm comparison](/hub/burglar-protection/water-leak-alarm-wifi) holds the shelf prices, from £13.59 to £59.99. The Products Compared editorial team did not wet-test these units. A qualifying purchase on amazon.co.uk can earn us a commission at no extra cost to you. The checks below do not rank a winner.

You are about to pay for a sensor because a washing-machine hose, a sink trap or a loft tank has already made you nervous.

Our top picks

SwitchBot SwitchBot detector with 1 m cable

Best overall

SwitchBot SwitchBot detector with 1 m cable
9.0/10about £19.99
View offer
X-Sense X-Sense SWS54 kit, 3 sensors

Alternative

X-Sense X-Sense SWS54 kit, 3 sensors
9.0/10about £55.99
View offer
SwitchBot SwitchBot water leak detector

Preis-Tipp

SwitchBot SwitchBot water leak detector
9.0/10about £16.99
View offer
On this page
  1. 1.What you are buying
  2. 2.Connection and the app you already use
  3. 3.Alerts at home and when you are away
  4. 4.Cable, IP rating and the battery line

What you are buying

What you are buying is a battery contact sensor. Water has to bridge its probes, or a short lead, before it tries to reach an app. None of the seven listings closes the stopcock. Building Regulations regulation 36 sets a water-efficiency figure for a new dwelling. It does not require this alarm. UK shop pages often mix a spot puck, a sensing cable, a flow monitor and an automatic shut-off into one article. A WRAS-listed Floodcheck auto valve was £225 on the Colter shop. Opening the pipe is a WaterSafe plumber's job. Placing a battery puck is not.

Connection and the app you already use

The first line to check is how the listing reaches Wi-Fi. Direct units join 2.4 GHz themselves: SwitchBot with no extra hub, and Mengshen or DAYTECH on Smart Life or Tuya. The other path is a mains base. The X-Sense SWS54, at £55.99, includes the SBS50, a power adapter and three sensors. The SWS0A at £13.59 is the trap: app features need that base, and the base is not in the box. A 5 GHz-only name will not pair these products. The link between an X-Sense base and its sensors is on the direct or base-station page. Stay with the app you already run. DAYTECH's specification line does not name an app; Tuya appears in reviews.
SwitchBot SwitchBot detector with 1 m cable

Testsieger

SwitchBot SwitchBot detector with 1 m cable
9.0/10about £19.99
View offer

Alerts at home and when you are away

A siren in an empty house is not an alert. You want a path to the phone, and a sound if someone is home and the internet is not. Phone alerts die with the router or with the vendor cloud. Email, in this set, is stated on SwitchBot and not as a universal feature. SwitchBot bullets put a stated 100 dB siren on the device. The SWS54 bullets say the sensor and the base sound together at up to 110 dB. The SWS0A puts up to 100 dB on the base and a red light on the puck. Those figures are claims. One sensor does not cover a kitchen.

Cable, IP rating and the battery line

A puck only sees water that reaches its probes. A cable lets the probes sit in the puddle while the radio stays outside a metal cupboard. On the SwitchBot at £16.99 the bullets mention a 1 m probe and the included line does not list a cable. On the W4402010 at £19.99 the included line does list the cable. DAYTECH's 78 in and 6.5 ft are the same length. IP67, as SwitchBot states it, is dust-tight plus a short immersion, not a shower-tray permit. IP66 on the X-Sense kit is the jet rating. SwitchBot bullets say two AAA and up to 24 months; the specification says 1 A batteries. The SWS54 included parts name six AAA, and the specification says 2 CR123A.

Common questions

Does a Wi-Fi water leak detector turn the water off?
No listing in this 15 October 2026 set shuts the stopcock. Each one is a battery contact sensor that can sound an alarm and try to reach a phone. A shut-off valve is a different product. A WRAS-listed Floodcheck auto valve sat at £225 on the Colter shop, and fitting it means opening the pipe, which is a WaterSafe plumber's job.
Will it work on 5 GHz Wi-Fi?
No. The direct sensors and the X-Sense base are 2.4 GHz. A phone parked on a 5 GHz name during pairing is a common reason the unit never joins. Use the 2.4 GHz name, or split the bands, and then retry. That limit is on the listings and on the manufacturer notes used here.
Is IP67 safe in a shower tray?
IP67, as SwitchBot states it, is dust-tight plus a short immersion. It does not mean the puck should live in a shower tray. Splash from a normal shower can bridge the probes when nothing is leaking. IP66 on the X-Sense kit is a jet-water claim, not an immersion claim. Mengshen and DAYTECH print no IP figure.
Why do the bullets and the specification disagree on batteries?
On SwitchBot, the bullets say two AAA and up to 24 months, and the specification says 1 A batteries. On the cabled single it also says lithium. On the SWS54, the included parts say six AAA and the specification says 2 CR123A. Keep both sentences. Up to 24 months is a claim. The Consumer Rights Act 2015 expects the goods to match the description.
Is one sensor enough for a kitchen?
Usually not. A puck sees only the water that reaches its probes, and a washer hose, a dishwasher connection and a sink trap often pool in different places. One £16.99 SwitchBot covers one of those spots. A three-pack or the SWS54 kit covers several corners only if each radio, or each link to the base, still works from that corner.
Is the £13.59 X-Sense sensor a complete alarm?
No. The SWS0A needs an SBS50 before the app features work, and that base is not in the box. The £55.99 SWS54 kit is the listing that includes the base, the adapter and three sensors. Buy the £13.59 puck only when that base is already on the wall. The siren on the add-on is stated at the base, not as a buzzer in the puck.

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Wi-Fi leak detector: no hub or a base station

Sources

Public UK sources and the amazon.co.uk listings in this comparison. Last checked 15 October 2026.

  1. GOV.UK: Radio Equipment Regulations 2017 (retrieved 15 October 2026)
  2. GOV.UK: regulations for consumer connectable product security (retrieved 15 October 2026)
  3. Ofwat: supply pipes (retrieved 15 October 2026)
  4. Building Regulations 2010, regulation 36 (retrieved 15 October 2026)
  5. Met Office: frozen or burst pipes (retrieved 15 October 2026)
  6. Aviva: water damage and escape of water (retrieved 15 October 2026)
  7. SwitchBot UK: water leak detector (retrieved 15 October 2026)
  8. X-Sense: SWS54 smart water leak detector kit (retrieved 15 October 2026)