Disc 4 - Kinetico Meter Disc - Up to max hardness of 246ppm (mg/) 1507

The Kinetico Meter Disc 4 (part number 1507) is a small calibration disc supplied by WrekinWater that calibrates a Kinetico non-electric water meter for water hardness up to 246ppm (mg/L), a range common across many hard water areas of the UK. Fitting the disc that matches a genuine hardness test result ensures the softener regenerates at the right point, protecting your home or business from limescale without overworking the system.

Technical specifications

Symptoms that mean you need this part

• Limescale is building up on taps, kettles or appliances despite the softener appearing to run normally, hinting the disc reads too low for your hard water
• A recent hardness test in the hard water range doesn't match the disc currently fitted in the meter
• Regeneration is happening less often than expected for a known hard water postcode
• You've had a plumber or water company confirm a hardness figure that differs from your current disc's rating

Why it fails / why it matters

In a hard water area, the resin bed in a softener works through its softening capacity faster per litre than it would on a soft supply, so the meter needs a disc calibrated to that higher hardness to count accurately. If a lower-rated disc is fitted, the meter under-estimates how quickly capacity is being used, meaning regeneration is called for later than it should be, and hard water can start passing through the system before the next cycle. As with all Kinetico discs, this is purely a calibration mismatch rather than a fault or wear issue, and is corrected by fitting the disc rated to your actual tested hardness.

Why buy this from WrekinWater

WrekinWater has served more than 50,000 customers over 15 years from its base in Bettisfield, Shropshire, and stocks the full range of genuine Kinetico meter discs alongside Pentair Fleck, Autotrol and Clack parts for hard water households and businesses. As a UK-registered company (Company No. 11000488) rated Excellent on Trustpilot, WrekinWater makes it simple to get the correct disc for your hard water test result.

How to fit it

1. Get a current water hardness test result for your property, in ppm (mg/L)
2. Confirm the reading sits within Disc 4's range, up to 246ppm (mg/L)
3. Turn off the water supply to the softener and relieve system pressure before opening the meter housing
4. Open the Kinetico water meter body and take out the disc currently installed
5. Fit Disc 4 (part number 1507), making sure it seats correctly, then reassemble the meter housing
6. Restore the water supply and check the meter turns freely and the softener resumes correct regeneration timing