Biasi BI1351103 DHW Flow Group Plug – Genuine Boiler Part

Description

Genuine Biasi BI1351103 Flow Group Kit DHW Plug

The Biasi Flow Group Kit DHW Plug (Part No. BI1351103, GC No. H74-530) is a genuine manufacturer replacement part for the Advance, Advance Plus and Inovia ranges of Biasi domestic gas boilers. This plug forms part of the domestic hot water (DHW) flow group assembly, sealing a key port within the flow group housing to maintain correct water pressure and prevent leaks.

A worn, cracked, or improperly seated DHW plug is a common cause of dripping or weeping from the flow group, as well as inconsistent hot water delivery at the tap. Because the flow group plays a central role in detecting when a hot tap is opened and triggering the boiler to fire, even a small leak or seal failure at this point can affect overall DHW performance.

This plug is manufactured to Biasi’s original specification, ensuring a precise, leak-free fit within the flow group housing. Whether you’re a Gas Safe registered engineer investigating a DHW leak or a confident installer replacing a known faulty part, this component restores the flow group to full working condition.

Biasi Boiler Models & GC Numbers :

Advance Series

• Advance 25C — GC No. 47-583-43
• Advance 25S — GC No. 41-583-33
• Advance 30C — GC No. 47-583-44
• Advance 30S — GC No. 41-583-34
• Advance 35C — GC No. 47-583-45

Advance Plus ERP Series

• Advance Plus 16S ERP — GC No. 41-583-27
• Advance Plus 25C ERP — GC No. 47-583-35
• Advance Plus 25S ERP — GC No. 41-583-28
• Advance Plus 30C ERP — GC No. 47-583-36
• Advance Plus 30S ERP — GC No. 41-583-29
• Advance Plus 35C ERP — GC No. 47-583-37

Inovia Series

• Inovia 16S — GC No. 41-583-25
• Inovia 25C — GC No. 47-583-32
• Inovia 25S — GC No. 41-583-26
• Inovia 30C — GC No. 47-583-33
• Inovia 35C — GC No. 47-583-34

Inovia ERP Series

• Inovia 25C ERP — GC No. 47-583-38
• Inovia 25S ERP — GC No. 41-583-30
• Inovia 30C ERP — GC No. 47-583-39
• Inovia 35C ERP — GC No. 47-583-40

• • • If you’re looking for any other different Biasi Spares, follow the link provided.

At Heating and catering parts,

We certainly strive to provide the best possible customer experience. Consequently, we understand that sometimes a product may not meet your expectations or requirements. That is why we offer a comprehensive 30-day return policy to ensure your satisfaction. Please read our full Return Policy

We appreciate you buying from our store. Usually, If your order is received by 1:00 p.m. EST (Monday–Friday), we will ship the item the same day. You can count on us to deliver quickly and safely. In other words, we take pride in our prompt and trustworthy service and will do everything we can to ensure the safe arrival of your package.

Please note that weekends are not included in our next-day delivery guarantee. Delivery for orders placed on Fridays (the next day) is on the following Monday.

At the same time select the Saturday delivery option at checkout if you’d like your purchases delivered on a weekend day.

In a word thank you for choosing us!