Worcester Bosch UPM Pump Head 15-70CHG – Refurbished | Part No. 8716122126 / 8716117400

Pump failure in a Worcester Greenstar boiler leads to rapid overheating, loss of circulation, and immediate boiler lockout — the heat exchanger can sustain damage within minutes without correct flow. The Worcester Bosch UPM Pump Head 15-70CHG (Part No. 8716122126 / 8716117400) is the correct refurbished replacement pump head for the Greenstar CDI, CDI Classic, and CDI Classic ErP combi and system ranges, restoring reliable water circulation and protecting the heat exchanger from overheating damage.

This is a professionally refurbished genuine Worcester Bosch / Grundfos UPM component — the pump head only (not the full housing). Current part number is 8716122126, superseding the original 8716117400. Both are fulfilled by this listing. Supplied with a full 12-month warranty. Market price: £60.00 + VAT (National Boiler Spares). Minor cosmetic marks may be present.

Compatible Worcester Greenstar Models (Selected)

Refurbished. Tested. 12-Month Warranty.

Every refurbished Worcester pump head is tested before dispatch. This 8716122126 unit restores correct water circulation in CDI, CDI Classic, and CDI Classic ErP boilers, preventing overheating and lockout. Supplied with a full 12-month warranty.

Delivery & Returns

Orders placed before 1:00 PM (Mon–Fri) are dispatched the same working day. Standard and next-day delivery available. Returns accepted within 30 days.

Note: This is the pump head only — not the full pump housing assembly. Confirm part number 8716122126 / 8716117400 matches your existing head before ordering. Must be fitted by a Gas Safe registered engineer.

Product Reference