Vaillant Ecofit Pure 825 Combi 12 Plate Heat Exchanger – Refurbished | Part No. 0020211942

Reduced hot water flow and unstable temperatures in a Vaillant Ecofit Pure, Sustain, or Home Combi boiler are usually down to a plate heat exchanger that's no longer transferring heat efficiently between the heating and hot water circuits. The Vaillant Ecofit Pure 825 Combi 12 Plate Heat Exchanger, Part No. 0020211942, is the genuine replacement that restores that transfer and brings consistent hot water performance back to your boiler.

This is a professionally refurbished unit, cleaned, pressure-tested, and checked for leaks before dispatch, giving you reliable manufacturer-spec performance at a significant saving over a new part. It's a direct fit across the compatible Vaillant range, with no modification needed for installation.

Compatible Boiler Models

OEM Quality. Proven Performance. Backed by Warranty.

Every refurbished plate heat exchanger is cleaned, pressure-tested, and checked for leaks before dispatch. This 0020211942 unit restores efficient heat transfer and helps resolve the reduced flow and unstable temperature caused by a worn exchanger. Supplied with a full 12-month warranty, it's a reliable, cost-effective alternative to a brand-new replacement.

Delivery & Returns

Orders placed before 1:00 PM (Mon–Fri) are dispatched the same working day, with standard, next-day, and Saturday delivery options available at checkout. Returns are accepted within 30 days provided the item is unused and in original packaging; unless faulty, the buyer covers return shipping.

Note: Please confirm that part number 0020211942 matches your existing unit before ordering. Installation must be carried out by a Gas Safe registered engineer to ensure safety compliance and warranty validity.