Home › HK99 — Under-Sink Cartridge System
HK99 — Under-Sink Cartridge System
Cleaner drinking water in seconds: one all-in-one cartridge — PP, fibre, coconut-shell carbon and nano-silver — that twists out and in with no tools.
£64.99
inc VAT · free UK delivery · SKU HH2O-HK99
Buy now✔ NSF/ANSI certified components · ✔ WRAS-approved fittings · ✔ 14-day returns · 🇬🇧 UK stock
↺14-day returnsChanged your mind? Full refund within 14 days.
🚚Free UK deliveryDispatched from Birmingham, tracked as standard.
✅Independently testedIAPMO R&T to NSF/ANSI 53. WRAS fittings.
📧Real UK supportEmail a person in Birmingham, not a call centre.
Sold by Smart MCS Ltd, registered in England & Wales, company no. 08605448.
Registered office: 172 Colchester Road, Ipswich, Suffolk IP4 4RS. Dispatched from Birmingham.
Secure card payments handled by Stripe.
Registered office: 172 Colchester Road, Ipswich, Suffolk IP4 4RS. Dispatched from Birmingham.
Secure card payments handled by Stripe.
Why this system
- Reduces sediment, chlorine, heavy metals, cysts, asbestos & VOCs, taste and odour
- One HKF cartridge a year (£36.99) — that's it
- 6 L/min flow at 60 psi — fills a glass instantly
- Perfect for renters, caravans and boats — no permanent plumbing changes
- Wall-mount head, connect to the cold line, done
How it compares
| Happy H2O HK99 | Water2 Pod | Typical jug filter | |
|---|---|---|---|
| System price | £64.99 | £103 | £25–40 |
| Annual filter cost | £36.99 | £99 | £60–90 (monthly cartridges) |
| Flow | 6 L/min — straight from the tap | similar | slow gravity drip |
| Removes cysts/asbestos/VOCs | Yes | partial | no |
Competitor prices checked July–August 2026 from public listings; they may change. We aim to be the best-certified system at the price — never the cheapest unverified import.
Installation guides · Replacement filters & Subscribe-and-save · Delivery & returns