Baxi / Main / Potterton UPM3.6 Boiler Pump Kit – Refurbished | Part No. 7713520

Boiler error codes E119 or E110, noisy operation, and poor hot water or heating performance in Baxi, Main, or Potterton ErP boilers typically point directly to a failing pump kit. The UPM3 modulating pump is the primary water circulator in these boilers — when it fails, the system can no longer maintain the flow rate required for safe, efficient operation. The Baxi / Main / Potterton UPM3.6 Boiler Pump Kit (Part No. 7713520) is the correct refurbished replacement, restoring reliable circulation across a wide range of Duo Tec ErP, Ecoblue, Main Combi ErP, and Potterton Gold models.

This is a professionally refurbished genuine Baxi/Grundfos component. The kit includes the UPM3-6 modulating pump head, pump manifold body, and integrated Automatic Air Vent (AAV) — the complete assembly required for a like-for-like swap. Part 7713520 supersedes 7220533, 7223323, 7654033, 248042, and 248041 — all fulfilled by this current part number. Supplied with a full 12-month warranty.

Compatible Baxi / Main / Potterton Boiler Models

OEM Quality. Tested. 12-Month Warranty.

Every refurbished Baxi pump kit is stripped, cleaned, and run-tested to OEM standards before dispatch. This 7713520 kit resolves E119/E110 errors, noisy operation, and circulation faults across the Baxi Duo Tec, Main, and Potterton Gold ErP ranges. 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 at checkout. Returns accepted within 30 days in original unused condition.

Note: Please confirm that part number 7713520 (supersedes 7220533 / 7223323 / 7654033 / 248042 / 248041) matches your existing pump kit before ordering. Verify your boiler model and serial number suffix (AC/BC/CC/DC) where relevant. Installation must be carried out by a Gas Safe registered engineer.

Product Reference