BWT Perla Silk PS20UKWF 20L Wi-Fi Water Softener
Free Local Shipping
Free Local Shipping on orders over £100. Standard delivery to most UK postcodes within 2-3 working days. Express options available at checkout.
Contact Us
Give Us A Call +44 118 958 8882 Our team is here to help. We will provide expert advice on specifications, compatibility, and delivery options.
30-day Easy Return
30 days Easy Return — no questions asked. If you're not completely satisfied, send it back within 14 days for a full refund.
The BWT Perla Silk PS20UKWF is a 20-litre ion-exchange water softener sized for households of up to 8 people, with a nominal flow of 1,680 l/h to EN 14743 and a 24 kg salt reservoir. It meters what you actually use and regenerates in proportion, so salt and water go on softening rather than on a fixed timer. This is the Wi-Fi version: the BWT Best Water Home app shows status, water use and when salt will next need checking.
Applications & suitability
Key specifications
| Identity | |
| Brand | BWT |
| Model | PS20UKWF |
| Household size | Up to 8 people (average use at 300 ppm) |
| Performance | |
| Resin volume | 20 L |
| Flow rate | 5–50 l/min operating; 80 l/min max with straight connectors; 1,680 l/h nominal (EN 14743) |
| Pressure drop at nominal flow | 1.0 bar |
| Min operating pressure | 1.7 bar |
| Max working pressure | 5 bar |
| Max working temperature | 30 °C water (5–40 °C ambient) |
| Salt & connections | |
| Salt type | Tablet only |
| Salt reservoir capacity | 24 kg |
| Connection size | ¾″ BSP (DN20) with 22 mm high-flow hoses and Uniconnect block |
| Connection height | 622 mm (overflow 527 mm) |
| Electrical & control | |
| Power supply | 230 V mains via 12 V DC plug transformer |
| App support | BWT Best Water Home (Wi-Fi) |
| Operation | Automatic proportional regeneration, blending valve, brine safety valve, memory on power cut |
| Physical | |
| Dimensions (H × W × D) | 803 × 276 × 470 mm |
| Weight | 65 kg approx. (operating) |
| Standard | EN 14743 |
| Warranty | 5 years parts, 2 years labour @home (6-year upgrade available from BWT within 60 days of install) |
Installation & compatibility
Fit on the cold main downstream of the stopcock, meter and any protective filter, using the supplied Uniconnect block, bypass and 22 mm high-flow hoses; you also need a tundish or standpipe for the drain, an overflow to outside and a 230 V socket. Installation must comply with the Water Supply (Water Fittings) Regulations 1999, and your water supplier may expect a separate unsoftened drinking-water tap, so a competent plumber is recommended. Once fitted, BWT includes a free @home commissioning visit to set hardness and salt type.
Related & next steps
Same softener, without Wi-Fi and with battery back-up option.
ViewBWT’s own tablet salt, suitable for every Perla Silk size.
Add saltIdeal for
A large family home with three or more bathrooms, or a house with a high-flow unvented cylinder feeding several outlets at once, in a hard-water area, where you want a softener that regenerates on demand rather than on a clock and can be checked from your phone. Available for next-day national delivery or click & collect from our Reading trade counter.
