Morco Boilers RSF503 Horizontal Flue Kit, Boiler Flue Outlet, Horizontal Terminal Kit, Replacement Flue Set, Balanced Flue Accessory Part Number: RSF503

Morco Boilers RSF503 Horizontal Flue Kit, Boiler Flue Outlet, Horizontal Terminal Kit, Replacement Flue Set, Balanced Flue Accessory

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£65.69
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Morco Boilers RSF503 Horizontal Flue Kit, Boiler Flue Outlet, Horizontal Terminal Kit, Replacement Flue Set, Balanced Flue Accessory Part Number: RSF503
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Morco Boilers RSF503 Horizontal Flue Kit, Boiler Flue Outlet, Horizontal Terminal Kit, Replacement Flue Set, Balanced Flue Accessory

SKU W-449374
Manufacturer part number
RSF503
£65.69
inc VAT£54.74 ex VAT
Lead time: 1-5 working days

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Product: Morco Boilers RSF503 Horizontal Flue Kit, Boiler Flue Outlet, Horizontal Terminal Kit, Replacement Flue Set, Balanced Flue Accessory (Part no. W-449374)

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Description

Product Overview

The Morco Boilers RSF503 Horizontal Flue Kit is a genuine flue accessory designed for horizontal flueing on compatible Morco boiler installations. It provides a safe, tidy route for combustion gases to exit through an external wall while supporting efficient boiler operation. Ideal for replacement or new installs where a horizontal flue terminal is required.

Key Features

  • Horizontal wall termination kit – enables a clean, practical flue exit through an outside wall.
  • Designed for compatible Morco boilers – helps ensure correct fit and dependable operation when used as intended.
  • Replacement-ready solution – ideal when renewing worn or damaged flue components to maintain safe performance.
  • Purpose-made boiler flue accessory – supports compliant, professional installation and a neat finished appearance.

Use Case / Application

Suitable for heating and plumbing installations where a Morco boiler requires a horizontal flue kit (also searched as a boiler flue outlet or horizontal terminal kit). Commonly used in:

  • Static caravan and park home boiler setups
  • Utility rooms and plant areas with an external wall nearby
  • Small domestic spaces where a vertical flue route is not practical
  • Replacement jobs during servicing, maintenance, or boiler upgrades

Problem → Solution

Ideal for situations where you need a compatible horizontal flue route to vent safely through a wall and replace an existing flue kit with the correct specified part.

Product Specifications

• Manufacturer – Morco Boilers
• Manufacturer Part Number (MPN) – RSF503
• Product Type – Horizontal Flue Kit
• Typical Applications / Use Cases – Horizontal flue termination for compatible Morco boiler installations; replacement flue kit for servicing and maintenance

Why Buy from BHL

Morco Boilers is a trusted name for reliable boiler components and accessories, with flue kits designed for safe, correct installation. Buy the Morco Boilers RSF503 Horizontal Flue Kit online from BHL for competitive pricing, free and fast UK delivery* and genuine parts supplied with care from UK warehouses. BHL are a specialist online merchant, trusted by thousands of satisfied customers online since 1998 with thousands of 5 star reviews. Order today for a smooth, dependable replacement.
*see our terms

Reviews

Buying guide: Domestic Boiler Accessories

Domestic boiler accessories are the parts that complete a boiler installation: flue kits, extensions, bends and terminals, plume management kits, programmers, room thermostats and wireless controls, weather compensators, filters, pressure relief valve kits and natural gas to LPG conversion kits. Boiler and flue packs are also included.

Flues

Flue systems are designed for particular boiler ranges, so use only the flue parts the boiler manufacturer lists for your model. Concentric flues run the air intake around the exhaust pipe and are commonly 60/100mm or 80/125mm in diameter; twin pipe systems use separate air and exhaust pipes. The installation manual sets the maximum flue length for each boiler, and every bend or elbow reduces the length allowed. Plume management kits redirect the visible plume from a condensing boiler away from where it could cause a nuisance.

Controls

Programmers set the times for heating and hot water, and room thermostats, wired or wireless, switch the heating according to the room temperature. A weather compensator adjusts the boiler's output using an outdoor temperature sensor. In England, gas and oil boilers need time and temperature controls, and when a combi boiler is installed one extra energy saving measure is also expected: flue gas heat recovery, weather compensation, load compensation or a smart control with automation and optimisation. Check that any control is compatible with the boiler, as some are made for one manufacturer only.

Safety

Work on gas pipework, appliances and their gas parts must only be carried out by a Gas Safe registered engineer. Oil boilers should be worked on by an OFTEC registered technician.

For replacement parts, see boiler spares; for thermostats and programmers, see heating controls.

Shop all Domestic Boiler Accessories

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