Pack of 2 Refill Cartridges for McAlpine Scale Defender Starter Kit Product:Refill Cartridges - Outlet fits 4″/110mm inside

- Outlet fits 4″/110mm inside diameter of PVC-U and cast iron soil pipe

M Profile Press Fittings eliminate this downtime

- Independent tests prove conclusively that there is no build-up of sediment in the flex

- Volume 100°C: 7 litres

- Size 225 x 155mm

Pack of 2 Refill Cartridges for McAlpine Scale Defender Starter Kit Product:Refill Cartridges - Outlet fits 4″/110mm insideDESCRIPTION: The Scale Defender safely seals and removes calcium, protecting your boiler, drinking water, appliances and entire home. The Kit includes Scale Defender unit, cartridge and 15mm and 22mm connectors. Polyphosphate is a food grade (consumable) product approved by the World Health Organization and Food and Agricultural Organization. It is widely used today in the food processing industry for cheese, meat, wine and other products. McAlpine