Description
Protect your entire plumbing system from limescale damage with the KeyPlumb 22mm Electrolytic Scale Reducer (KPESR22). WRAS-approved and completely passive — no chemicals, no filters, no electricity, no ongoing costs. The 22mm compression fitting integrates directly into your cold water rising main or primary circuit, using proven electrolytic technology to prevent scale build-up at the source. Ideal for larger-bore pipework and whole-house installations in hard water areas.
Key Features
-
WRAS Approved — certified for use in UK potable (drinking) water systems
-
No Chemicals Required — no salts, additives, or chemical treatments
-
Zero Maintenance — no filters to replace, no ongoing costs; passive system
-
No Power Required — works from water flow alone
-
Whole-House Protection — install on rising main or primary circuit to protect boilers, appliances, and pipework
-
22mm Compression Fitting — suits larger-bore pipework; straightforward installation
-
Preserves Water Quality — maintains natural mineral content; no brine discharge
-
Ideal for Hard Water Areas — recommended where calcium carbonate exceeds 200ppm
Technical Specification
-
Brand: KeyPlumb
-
SKU / Model: KPESR22
-
Barcode (EAN): 5056277502193
-
Size: 22mm compression fitting
-
Technology: Electrolytic scale reduction
-
Certification: WRAS approved
-
Connection Type: Compression fittings (both ends)
-
Weight: 0.15kg
-
Power: None required (passive system)
-
Maintenance: None required
-
HS Code: 842121
What’s Included
- KeyPlumb 22mm electrolytic scale reducer unit
- 22mm compression fittings (both ends)
- Installation instructions
- WRAS certification documentation
Also Available
Frequently Asked Questions
How does an electrolytic scale reducer work?
As water passes through the unit, the electrolytic process alters the structure of calcium and magnesium minerals so they remain suspended in the water rather than forming hard scale deposits on pipes, heating elements, and appliances. No chemicals or power are required — the reaction is triggered by water flow alone.
When should I choose 22mm over 15mm?
Choose the 22mm version when your rising main or primary circuit uses 22mm copper pipe. This is common in larger properties, older installations, or where higher flow rates are required. If your pipework is 15mm, see the KPESR15 15mm version.
Where should I install it?
Install on the cold water rising main immediately after the stopcock, or on the primary circuit feed, for whole-house protection. Professional installation by a qualified plumber is recommended.
Is this suitable for drinking water systems?
Yes — WRAS approval confirms this unit is safe for use in potable (drinking) water systems and complies with the Water Supply (Water Fittings) Regulations. It does not add chemicals or alter the taste of your water.
How long does it last?
The electrolytic elements are designed for long-term passive performance, typically 10+ years in normal use, with no servicing or replacement parts required.
Can I order if the item shows as out of stock?
Yes — we can fulfil this product even when stock shows as zero. Place your order as normal and we’ll confirm lead time with you. For urgent enquiries, call us on 01603 381095.
Delivery Information
This is a small, postable item covered by a one-off small item delivery charge. You can combine it with other small items in a single order and pay just one delivery charge. Browse all items covered by the small delivery charge.
