SimPure Double Jumbo 10" Filtration System with Sediment and Carbon CTO Filter

The SimPure DB10C-2 is a heavy-duty, two-stage whole house filter housing built around the industry-standard 10" x 4.5" cartridge format. Mounted at the point of entry, it conditions all the water entering your home – kitchen, bathrooms, showers, washing machine and outside taps – from a single installation point.

Both cartridges arrive pre-installed, so the system is ready to plumb in straight out of the box.

How the two stages work

• Stage 1 – Sediment cartridge: captures rust flakes, sand, silt and pipe scale that can stain fixtures, block aerators and shorten the life of appliances.
• Stage 2 – Carbon block (CTO) cartridge: reduces chlorine, chlorine by-products, taste and odour, leaving water that's noticeably softer on the palate and easier on the skin and hair.

Because the housing uses the universal 10" x 4.5" format, you're not tied to one supplier – any standard Big Blue cartridge will fit when it's time for a change, including specialist options like KDF, GAC, scale inhibitor or 1-micron carbon blocks.

Compatibility

• Standard 1" female BSP inlet and outlet ports – fits straight into UK whole-house plumbing.
• Accepts any standard 10" x 4.5" ("Big Blue") cartridge for future upgrades or specialist filtration needs.
• Suitable for cold mains feeds in domestic and light commercial settings.

Technical specifications

If your incoming mains pressure exceeds 90 psi (6.2 bar) you'll need to fit a pressure regulator upstream. UK mains pressure is typically well within range, but worth checking before installation.

Installation notes

The system is designed for wall mounting at the point of entry, downstream of your stopcock. It ships with everything needed for a standard install, so no extra fittings are required for the housing itself – only the connecting pipework to your mains.

We'd recommend installing isolation valves on the inlet and outlet so cartridge changes are quick and tidy. Cartridge replacement intervals depend on local water quality and household usage, but as a guide: sediment every 6 months, CTO every 6 – 12 months.

What's included

• DB10C-2 twin filter housing with mounting bracket and built-in pressure relief valve
• Pre-installed 10" x 4.5" sediment cartridge (Stage 1)
• Pre-installed 10" x 4.5" carbon block CTO cartridge (Stage 2)
• Filter bowl wrench
• 2 x wall mounting screws
• 2 x spare housing O-rings
• 2 x rolls of PTFE (Teflon) tape
• Punch positioning sticker for accurate wall marking
• Instruction manual

Follow the manufacturer’s installation guidance, confirm all connections are secure and flush the product as instructed before regular use.

Order before our dispatch cut-off — 3pm Monday to Friday, or 12pm on Saturday — and your order is sent the same day; anything after that follows the next working day. We don’t dispatch on Sundays, and you’ll get a tracking link by email as soon as your order is on its way.

Choose your UK delivery option at checkout:

• Free Express Delivery — free on orders over £60 (2–3 working days).
• Standard Delivery — £3.99 (2–3 working days).
• Next Day Delivery — £6.99, arriving the next working day when you order before the cut-off.

We also ship internationally, with rates calculated at checkout.

Returns & refunds

Changed your mind? You have 30 days to return any unused filter in its original sealed packaging for a refund, or 90 days for exchanges. Start at our returns portal and either generate a prepaid Royal Mail label (£3.49, deducted from your refund) or use your own courier — exchanges are always free to return. We approve refunds within 24 hours of your return reaching us; your bank may then take 3–5 working days to show the funds.