Home › 3S-10BB — Premium 3-Stage Whole-House System
3S-10BB — Premium 3-Stage Whole-House System
Full-house treatment for 2–4 bedroom family homes: sediment + GAC, premium multi-media (antiscale · alkaline · fluoride reduction · KDF55), and a resin polishing stage that fights limescale.
£189.99
inc VAT · free UK delivery · SKU HH2O-3S-10BB
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
- The only system at this price that treats limescale in the box — built for Britain's hard-water areas
- Stage 1: sediment + GAC (every 6–8 months, £9.99) · Stage 2: multi-media (12–16 months, £54.99) · Stage 3: ion-exchange resin (6–8 months, £14.99)
- Pre-assembled on a black steel wall bracket, spanners and fixings included
- 1" ports for mains flow — suits homes up to 4 bedrooms
- ~£89/year in filters — about half what comparable systems cost to run
How it compares
| Happy H2O 3S-10BB | iSpring WGB31B | Osmio Pro-II-XL | |
|---|---|---|---|
| Price | £189.99 | £278.99 | £589+ |
| Antiscale / softening stage | Yes — resin + silicon-phosphorus | no | extra cost |
| Fluoride reduction | Yes — Stage 2 media | no | model dependent |
| Certified components | NSF/ANSI 42 & 61 media, WRAS fittings | yes | yes |
| Filter cost / year | ~£89 | ~£120 | ~£150+ |
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