Honeywell Home Cylinder Stat - L641A Thermostat

2 reviews

£27.11 (Inc. VAT)

In Stock


Plumbworld has the lowest price for this product!


Keeping your water temperature just how you like it in your domestic hot water cylinder or pipes is essential, and the L641A Cylinder Thermostat from Honeywell Home will play a key role in this.

The L641A is designed to be surface mounted on your domestic hot water cylinders, and can be used to switch directly on a central heating circulating pump or boiler. Alternatively, this Honeywell Home Cylinder Stat  can operate on a spring return or motor open/motor close zone valves.

Well suited to switching motorised zone valves, circulating pumps or boilers, this thermostat incorporates a bi-metallic temperature sensor and is double insulated for extra protection.

The L641A can be used with bare or pre-insulated cylinders, and installation is simple: just a plastic coiled wire is required for fixing.

The Honeywell Home L641A Cylinder Thermostat is perhaps the most cost-effective way in which to manage your water temperature at home.

Product information:

  • Suitable for use on uninsulated and foam-lagged cylinders
  • Double insulated
  • Power supply: 230v (50hz)
  • Temperature setting range: 50-80°
  • Cable clamp: Yes
  • Comes complete with optional control knob


CE Approved


Honeywell Home Cylinder Stat - L641A Thermostat

£ 27.11 (Inc. VAT)

Stock status: In Stock
Order in next for delivery tomorrow - 10/12/2021
Interest Free in 4 Easy Payments

Pay £6.78 every two weeks with

Final credit amount & repayments subject to Zip terms & conditions. Maximum spend £1000.

Parcel Shipping - Free

Delivery to your home, 6 days a week with a next-day option for orders placed before 3:00pm.

All our parcel deliveries are FREE

365 Day Returns

Returns Policy - Changed Your Mind?

If you change your mind about the product when you receive it you can notify us any time within 365 days and return it for a full refund at your own cost. Any refunds will be made within 30 days of receiving your returned item. You are expected to cover the cost to return the item and your initial delivery charge will not be refunded.

More details here

Lowest Price Guaranteed
Plumbworld £27.11
Direct Heating Spares £30.05
Direct Heating Supplies £33.18
TDL Online £33.80
Bathrooms and Showers Direct £37.17 £38.65

Prices last checked on 09/12/2021
All prices are inc VAT and include delivery charges

Price Guaranteed For

2 Product Reviews

  • martinjh
    5/ 5

    Perfect fit to replace old one which had failed. Wired up exactly the same.Hope this one lasts as long as last one.

  • JDH
    4/ 5

    I was pleased to find that this was a direct replacement for the old unit that was the best part of 25 years old which made this a simple fit