Name: September Open Day
Start: 2025-09-07T11:00:00+01:00
End: 2025-09-07T16:00:00+01:00
Location: Hazeley Road, Twyford, SO21 1QA Winchester, United Kingdom

Join us at Twyford Waterworks on Sunday 7th September for a chance to step back in time and explore how your drinking water has been supplied for the past 125 years. The Open Day invites visitors to enjoy a day out at arguably the best-preserved Edwardian pumping station in the country.
Located on the edge of the South Downs, Twyford Waterworks is a Scheduled Ancient Monument set within five acres of chalk downland that is carefully managed to support a wide variety of wildlife.
This year we are celebrating 125 years of water supply to the local area. The wells were dug in 1898, the reservoir completed in 1899, and in 1900 the Waterworks began pumping fresh, clean water – a process Southern Water continues today using modern technology.
Throughout the day much of the site will be brought to life with demonstrations, displays, and explanations from our knowledgeable volunteers. A highlight will be the Hathorn Davey triple expansion steam pumping engine running: see the boilers being stoked and watch this majestic machine in operation evoking the sights, sounds and smells of the Edwardian era.
Also running at various times will be the Ruston diesel pumping engines, now 90 years old , and there will be volunteers on hand to explain how everything works. You’ll also see the 1895 Crossley gas engine in action, alongside several smaller pumps that keep the water flowing.
No visit would be complete without exploring the Lime Kilns and Water Softening Works where original water-powered machinery still operates and you can discover how lime was once used to soften hard water.
Twyford Waterworks isn’t just about industrial history – it’s also a haven for wildlife. Our nature trail winds through rare unimproved chalk grassland, past a pond and hide, offering the chance to spot birds, insects and wildflowers that thrive in this rare habitat.
When you're ready for a break, visit the renowned Tea Room, which will be serving homemade cakes, drinks and light refreshments. A BBQ will also be available on site, offering something more substantial to fuel your visit.