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PS25UK – Luxury Water Softeners PERLA Silk

An excellent choice for homes of up to 10 people.  The Perla Silk 25 is perfect for larger households whilst delivering copious amounts of perfectly softened water. Self standing and its small foot print means it can be conveniently installed a plant room, larger utility room or garage where there is access to the mains water supply and stopcock.

• Stylish design and impressive performance
• Automatic & intelligent regeneration for uninterrupted softened water supply
• Multifunction back-lit display
• Easy to set up and simple to live with
• Brine safety valve for added protection
• Premium ‘monospheric’ resin for maximum softening efficiency


Do you require installation?

Chosen Softener + £360* Fixed Price Installation

(subject to free site survey*)

*Includes installation, installation kit, associated plumbing and salt starter pack. This service is only available in selected areas at this time, please continue to check availability in your area



The price shown is for a standard Installation, our free site survey will confirm whether this is possible or not within your home. Additional cost may be required if non standard installation. Click here for more details

The PS 25UK is part of a compact and concise range of modern appliance like water softeners that bring a wealth of features and benefits to the market; like  symbol driven set up, IOT capability (wi-fi models only) easy connection with the BWT uniconnect connect block and frugal use of salt and water.  All in a well designed and smart cabinet designed and developed for UK homes and plumbing systems.  Each model is easy to install and live with.

Free @ Home Commissioning

is the perfect way to ensure your new Luxury water softener is perfectly set up for you, your home, your lifestyle and your local water conditions. Set up correctly your new Luxury Water softener will adapt to your normal water usage. This ensure that you have copious amounts of silky soft Luxury Water and minimises your water and salt usage. BWT’s Free @ Home Commissioning also provides the perfect opportunity for you to ask any questions.

Market Leading Warranty

The PS10UK is  supplied with a full 5 year parts and 2 year labour @ home warranty. In the unlikelihood that your new softener should develop an issue  there is no need to worry about getting it back to us, we will come to you. One of our fully trained engineers will soon have your favourite appliance back up and running again and no cost to you.  When your warranty runs out you can simply top it  up for a small fee. Ensuring you’re free to enjoy all the benefits of  luxury water worry free.

Additional information

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BWT Perla Silk Type PS25UK
Nominal connection (outside thread) BSP ¾“ (DN 20)
Nominal flow rate in accordance with EN 14743 l/h 1680
Operating pressure (min./max.) bar 1.7 / 5.0
Operating flow range (min./max.) l/min 5 / 50
Maximum flow rate * l/min 80
Quantity of ion-exchange resin l 25
Nominal capacity Litres 4167
Capacity salt reservoir kg 24
Salt consumption per regeneration kg 1.2 – 3.0
Water consumption per regeneration l 145
Protection class IP 51
Water temperature (min./max.) °C 5 /30
Ambient temperature (min./max.) °C 5 /40
Electrical connection V/Hz 230 / 50
Dimensions: Width x depth x height (W x D2 x H) mm 276 x 470 x 803
Connection height (A) / Overflow height (S) mm 622 / 527
Operating weight, approx. kg 70
Fitting Kit mm Hi-Flow: 22mm Valves and Hoses 
*Tested with HiFlow connection – continuous operation at this level may affect softening efficiency


What Does BWT Stand For?

Best Water Technology

Perla Silk Brochure
Perla Silk WS Series Compaison Sheet
Perla Silk Operating Manual