4 Metre Railway Sleeper Pond Kits – Extra-Large Ornamental & Koi Pond Water Features (UK Made)

Create a breathtaking garden centrepiece with our 4 metre railway sleeper pond kits—expertly crafted in the UK for extra-large ornamental water features and expansive koi ponds. All pond kits are fully interchangeable: select 4m as your pond length and choose your preferred width (from 1.5m up to 5m) for a truly bespoke and impressive pond. The 4m size is perfect for those who want to maximise swimming space for fish and make a real statement in their garden.

Available Widths for 4m Long Ponds

• 1.5m, 1.8m, 2m, 2.6m, 3m, 3.4m, 4m, 5m (litre capacities shown per product)

Why Choose Our 4m Pond Kits?

• Extra-large option for premium koi ponds and ornamental water features
• Fully customisable—choose your ideal width for a perfect fit
• Maximum space for fish to swim and thrive
• Made in the UK from durable timber sleepers
• All-in-one kit: pre-cut timber, liner, professional-grade sealant, and clear instructions
• Includes one standard viewing window – upgrade available to add a second window
• Average delivery time: 3–5 weeks (up to 6 weeks during peak season)
• Expert UK-based support
• Trusted by thousands of customers nationwide

Perfect for:

• Extra-large koi ponds and serious fish-keeping projects
• Premium ornamental garden ponds and water features
• Modern patios, lawns, and spacious garden designs
• Showcasing underwater views with built-in viewing windows

Order your 4m railway sleeper pond kit today – made to order and delivered across the UK in 3–5 weeks on average.

Frequently Asked Questions

Are these ponds suitable for koi?

Yes, our 4m pond kits are ideal for extra-large koi ponds, giving your fish maximum space to swim and thrive. The larger the pond, the better for koi and serious fish-keeping.

Can I choose my pond width?

Absolutely! All pond kits are interchangeable—select your preferred length and width for a custom fit. For example, a 4m pond can be paired with widths from 1.5m up to 5m.

Does the kit include a viewing window?

Yes, every 4m pond kit comes with one standard viewing window. You can upgrade to add a second window for even more visual impact.

How long does installation take?

Most customers complete the main structure in one day. Once the custom liner arrives, you can finish the build—typically your pond is ready to fill and enjoy within 1–2 weeks from delivery.

What is the delivery time?

All pond kits are made to order and delivered across the UK in approximately 3–5 weeks (up to 6 weeks during busy periods).

What about filtration?

Every pond is unique, with different requirements depending on your design and fish type. For the best results, please contact us to discuss a suitable filtration system for your pond. We offer a range of premium filters to suit all our pond sizes, and pond kit customers receive 10% off any filter purchase.

Do you offer support if I get stuck?

Yes, our UK-based team is on hand to help by phone or email throughout your build.