The Heatline Monza 24C 3-Way Diverter Valve restores your boiler’s ability to switch between heating and hot water systems. This 3-way valve body controls water flow direction, improving both performance and efficiency. The part number D020103888 fits Heatline Monza models and ensures a reliable, watertight seal.

Compatible Boilers

To help you select the correct part, this diverter valve body is compatible with the following boiler models:

Heatline Monza Series (2011–2012):

• Monza 24C (GC No. 47-157-21)

• Monza 28C (GC No. 47-157-22)

If you’re looking for a Heatline Boiler Compact C24 Diverter Valve or any other different Heatline Diverter Valve, follow the link provided.

Why Choose This Product?

This Heatline Monza diverter valve body provides a fast, effective solution for flow-related boiler problems. It corrects issues like poor hot water or inconsistent heating. Because it’s made from durable materials, it resists wear and helps extend your boiler’s lifespan. Every unit is tested to meet strict quality standards. Choose this part for a precise fit and long-lasting performance.

Delivery and Return 

We dispatch orders placed before 1 PM on the same working day. Choose from tracked standard delivery or next-day courier service. Returns are accepted within 30 days if the item is unused and in original packaging.

Always use a qualified, Gas Safe registered engineer to install or replace boiler parts safely.