Description
Protect your entire plumbing system from limescale damage with the KeyPlumb 15mm Electrolytic Scale Reducer (KPESR15). WRAS-approved and completely passive — no chemicals, no filters, no electricity, no ongoing costs. The 15mm compression fitting integrates directly into your cold water rising main, using proven electrolytic technology to prevent scale build-up at the source. Ideal for hard water areas across the UK.
Key Features
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WRAS Approved — certified for use in UK potable (drinking) water systems
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No Chemicals Required — no salts, additives, or chemical treatments
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Zero Maintenance — no filters to replace, no ongoing costs; passive system
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No Power Required — works from water flow alone
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Whole-House Protection — install on rising main to protect boilers, appliances, and pipework
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15mm Compression Fitting — straightforward installation into standard pipework
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Preserves Water Quality — maintains natural mineral content; no brine discharge
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Ideal for Hard Water Areas — recommended where calcium carbonate exceeds 200ppm
Technical Specification
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Brand: KeyPlumb
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SKU / Model: KPESR15
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Barcode (EAN): 5056277502186
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Size: 15mm compression fitting
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Technology: Electrolytic scale reduction
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Certification: WRAS approved
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Connection Type: Compression fittings (both ends)
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Maximum Working Pressure: 10 bar
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Operating Temperature: 5°C to 65°C
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Power: None required (passive system)
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Maintenance: None required
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HS Code: 842121
What’s Included
- KeyPlumb 15mm electrolytic scale reducer unit
- 15mm compression fittings (both ends)
- Installation instructions
- WRAS certification documentation
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.
Where should I install it?
Install on the cold water rising main immediately after the stopcock for whole-house protection. This ensures all water entering the property is treated before reaching boilers, appliances, and hot water systems. 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 is this different from a water softener?
Traditional water softeners require regular salt top-ups, produce brine waste, and remove beneficial minerals from the water. This electrolytic unit requires no salt, produces no waste water, maintains natural mineral content, and has no running costs.
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.
