Product Description

150mm 33 Degree Elbow with Door – VIT-Smooth Vitreous Enamel

Model: 67-150-042

The 150mm VIT-Smooth 33 Degree Elbow with Door changes the direction of a single-wall connecting flue by 33 degrees. In addition, its built-in access door provides a useful point for inspection and chimney sweeping.

The smooth three-segment bend helps create a gentle change in direction. Therefore, it can help align a stove pipe with a chimney, flexible flue liner or insulated twin-wall connection.

Furthermore, the smooth matt-black vitreous enamel finish matches most traditional and modern UK stoves. The elbow suits compatible wood-burning, multifuel, gas and oil appliances.

150mm 33 Degree Elbow with Door at a Glance

• Flue diameter: 150mm (6 inches)
• Bend angle: 33 degrees
• Construction: Smooth three-segment elbow
• Cleaning access: Built-in access door
• Material: 1.2mm zero-carbon steel
• Finish: Matt-black vitreous enamel
• Fuel suitability: Gas, oil and solid fuel
• Temperature classification: T600
• Product standard: EN 1856-2
• Product designation: EN 1856-2 T600 N1 Vm L80120 G450
• Distance from combustibles: 450mm
• Model/SKU: 67-150-042
• EAN: 5060795860215

Key Features and Benefits

• Creates a smooth 33-degree change in flue direction
• Includes a built-in door for inspection and sweeping
• Helps form small offsets in a 150mm stove-pipe system
• Uses a smooth three-segment construction
• Provides a gentler change in direction than a 45-degree elbow
• Works with compatible 150mm VIT-Smooth components
• Uses strong 1.2mm zero-carbon steel
• Includes internal and external vitreous enamel
• Features a smooth matt-black finish
• Uses close-fitting friction joints
• Suits compatible wood-burning and multifuel stoves
• Also suits compatible gas and oil appliances
• Meets the EN 1856-2 T600 N1 Vm L80120 G450 designation

What Is a 33 Degree Stove-Pipe Elbow?

A 33-degree elbow changes the direction of a connecting flue without creating a sharp turn. Therefore, it can help move the pipe around a small obstruction or align it with an off-centre chimney connection.

Installers often use two matching elbows to create an offset. First, one elbow moves the flue away from the original centre line. Next, the second elbow returns the pipe to a vertical route.

The distance between the two bends will affect the final offset. Therefore, always check the product dimensions and calculate the required pipe length before ordering.

A single 33-degree elbow can also change the direction of a flue route. However, the complete system must still follow the appliance instructions and current installation rules.

What Does the Built-In Access Door Do?

The built-in door gives a chimney sweep direct access to the inside of the elbow. As a result, it can make inspection and cleaning easier at the change in direction.

For example, a chimney sweep may use the door to:

• Inspect the inside of the elbow
• Insert suitable sweeping equipment
• Remove soot and other deposits
• Check for a blockage
• Inspect the adjoining flue pipes

Changes in direction can make chimney cleaning more difficult. Therefore, access at the elbow can improve future maintenance.

However, one door may not provide access to every part of the system. The installer and chimney sweep must confirm that they can reach the full flue route.

When Should You Use a 33 Degree Elbow?

This elbow can help when a straight stove pipe does not line up with the chimney connection. It can also help the flue avoid a small obstruction while maintaining a smooth route.

Typical uses include:

• Creating a small offset above a stove
• Aligning the stove pipe with a chimney opening
• Connecting towards a flexible flue-liner adaptor
• Connecting towards an insulated twin-wall chimney
• Avoiding a suitable non-combustible obstruction
• Adding inspection access at a change in direction
• Improving chimney-sweeping access
• Visible 150mm single-wall flue installations

However, do not use the bend to avoid the required distance from combustible materials. Also, never force poorly aligned parts together.

33 Degree Elbow vs 45 Degree Elbow

Feature	33 Degree Elbow	45 Degree Elbow
Change in direction	Gentler 33-degree angle	Greater 45-degree angle
Typical use	Smaller offsets	Larger offsets
Flue route	More gradual change	More direct change
Access door	Included on model 67-150-042	Available on selected 45-degree models
Best choice	Where a smaller correction will align the flue	Where the route needs a greater change

Choose a 33-degree elbow when the installation only needs a gentle change in direction. Alternatively, choose a 45-degree elbow when the flue must move further sideways.

In either case, check the dimensional drawing before ordering. The bend angle, pipe length and distance between elbows will all affect the final offset.

Why Choose an Elbow with an Access Door?

A standard elbow changes the flue direction but does not provide direct cleaning access. In contrast, this model combines the bend and sweeping door in one fitting.

Therefore, it offers several useful benefits:

• Direct inspection access at the bend
• Easier removal of soot and deposits
• Improved access for sweeping equipment
• Fewer separate access components
• Fewer visible joints in the flue route
• A cleaner appearance above the appliance

The access door can prove especially useful on solid-fuel systems because soot may collect around changes in direction.

Why Choose VIT-Smooth?

VIT-Smooth combines strong steel with an attractive matt-black enamel finish. As a result, it provides both strength and a clean appearance.

During production, the manufacturer carefully finishes the welded areas before adding the enamel. Therefore, the finished bend has less visible weld lines than many standard black stove pipes.

The manufacturer uses 1.2mm zero-carbon steel and adds approximately 0.2mm of powder vitreous enamel. Together, these layers create an approximate total thickness of 1.4mm.

Furthermore, the enamel covers the inside and outside of the elbow. It helps protect the steel against heat, combustion gases and corrosive deposits.

Finally, the deep matt-black finish matches other VIT-Smooth pipes, bends, tees and adaptors. It also complements most traditional and modern stoves.

Technical Specification

• Product: Smooth 33 Degree Elbow with Door
• Brand: VIT-Smooth
• Manufacturer: Mi-Flues
• Model: 67-150-042
• EAN: 5060795860215
• Nominal diameter: 150mm (6 inches)
• Elbow angle: 33 degrees
• Construction: Smooth three-segment elbow
• Access: Built-in inspection and sweeping door
• Material: Zero-carbon steel
• Steel thickness: 1.2mm
• Enamel thickness: Approximately 0.2mm
• Total finished thickness: Approximately 1.4mm
• Coating: Powder vitreous enamel
• Coating position: Internal and external
• Colour: Matt black
• Joint type: Friction fit
• Fuel compatibility: Gas, oil and solid fuel
• Temperature classification: T600
• Maximum continuous temperature classification: 600°C
• Product standard: EN 1856-2
• Full designation: EN 1856-2 T600 N1 Vm L80120 G450
• Distance from combustibles: 450mm

Suitable Appliances and Flue Systems

This 150mm 33-degree elbow suits compatible:

• Wood-burning stoves
• Multifuel stoves
• Gas heating appliances
• Oil-fired appliances
• 150mm VIT-Smooth connecting pipes
• Flexible flue-liner connections
• Masonry chimney connections
• Insulated twin-wall chimney systems

However, always check the appliance instructions before ordering. The appliance manufacturer must allow the 150mm flue diameter and proposed bend arrangement.

You can also view the full 150mm vitreous enamel stove-pipe range to find matching pipes, bends and adaptors.

Planning a Flue Offset

Installers often use two elbows to create an offset. However, the distance between those elbows will change the total sideways movement.

First, measure the distance between the stove outlet and the intended chimney centre line. Next, check the available height. Then, compare those measurements with the product dimensions.

In addition, allow enough space around the access door. A chimney sweep must have enough room to open it and use suitable cleaning equipment.

Do not position the door against a wall, appliance panel or another obstruction. Also, do not hide it inside a permanent enclosure.

Finally, support the complete flue correctly. The stove outlet and elbow must not carry the full weight of a flexible liner or chimney system.

Checking Appliance Compatibility

A 150mm stove outlet will not always accept every 150mm flue fitting. For example, appliance spigots can use different internal sizes, external sizes and joint shapes.

Therefore, check the following details before ordering:

• The flue diameter stated in the appliance instructions
• The exact size of the appliance outlet
• The type of stove spigot
• Whether the installation needs a stove adaptor
• The required bend angle
• The required sideways offset
• The available height above the appliance
• The position and access space for the sweeping door
• The required chimney or liner connection
• The distance to combustible materials

Furthermore, never reduce the flue diameter unless the appliance manufacturer and current regulations allow it.

Correct Installation Direction

Install the elbow with the smaller or male end pointing downwards towards the appliance. Then, connect the upper end towards the chimney system.

This layout helps keep condensates and combustion deposits inside the flue. As a result, it reduces the chance of staining on the outside of the pipe.

However, do not turn the fitting upside down to create another connection type. Instead, use the correct stove adaptor or connecting pipe.

In addition, position the access door so a competent person can reach it safely. Keep enough space around the door for future inspection and cleaning.

Using the Access Door Safely

Always keep the access door fully closed while the appliance operates. An open or loose door could allow smoke and harmful combustion gases to enter the room.

Before opening the door, allow the appliance and flue to cool fully. Hot soot, ash and metal surfaces can cause serious burns.

Next, protect the area below the elbow because loose soot may fall from the pipe. Then, open the door with the correct tool and use suitable cleaning equipment.

After cleaning, remove loose deposits from the door and opening. Finally, close and secure the door before using the appliance again.

Do not use the appliance if the door, fastener or closing surface shows damage. Instead, repair or replace the affected part first.

Jointing and Sealing

VIT-Smooth components use close-fitting friction joints. Therefore, they do not need fire clay for standard assembly.

However, always follow the current VIT-Smooth and appliance instructions. If those instructions allow it, you can apply suitable fire cement or high-temperature silicone for extra security.

Only use a jointing product that suits the flue temperature and fuel type. In addition, push each joint together fully and keep the connecting parts straight.

Do not seal the access door permanently. The door must continue to open for inspection and chimney sweeping.

Can You Cut the Elbow?

A formed elbow should normally remain at its original size. Cutting could damage its shape, joints or built-in access door.

Furthermore, cutting vitreous enamel can chip the coating and expose the steel. Therefore, never cut through the bend, door or door frame.

If the installation needs a shorter length, use a suitable fixed or adjustable connecting pipe. This option will usually provide a safer and cleaner result.

If the manufacturer allows cutting in a plain pipe section, protect every exposed steel edge with high-temperature stove paint. Also, remove sharp edges and check the connection carefully.

Important Installation and Safety Information

Use this VIT-Smooth elbow only as a single-wall connecting flue. It should connect a compatible appliance to a chimney, flexible liner or insulated twin-wall system.

Never run this single-wall elbow through a wall, ceiling, floor, roof, cupboard or concealed space. Instead, use a suitable insulated chimney system wherever the flue passes through the building.

Keep at least 450mm between the elbow and combustible materials. The product designation G450 confirms this declared distance for the 150mm model.

For example, combustible materials may include timber, furniture, wall coverings and some plasterboard structures.

Do not assume that plasterboard provides a safe non-combustible barrier. It may cover timber battens or another combustible structure.

Furthermore, follow any greater clearance stated in the appliance instructions. The highest clearance requirement always takes priority.

The stove outlet must not carry the full weight of the chimney. Therefore, use suitable supports to prevent excess downward or sideways force.

Finally, ask a competent installer to design and fit the system. For solid-fuel work, consider using a HETAS-registered installer. Alternatively, contact Building Control where required.

Inspection and Chimney Sweeping

The built-in door provides useful access at the 33-degree bend. However, it may not provide access to every part of the chimney.

Therefore, the installer and chimney sweep should check the complete flue route. They must make sure their equipment can reach every section that needs cleaning.

Depending on the layout, the system may need another access-door pipe, removable tee cap or cleaning point.

In addition, keep the elbow and access door visible. Do not permanently box them in or place them inside a closed space.

Cleaning and Maintenance

Arrange regular chimney inspection and sweeping. The correct frequency will depend on the appliance, fuel, level of use and chimney condition.

During each inspection, check the elbow, access door and adjoining joints. Look for movement, corrosion, distortion or enamel damage.

Also, check the door fastener and closing surface. The door must close securely before the appliance operates.

Use suitable chimney-cleaning equipment. Avoid abrasive tools because they may scratch or chip the enamel.

Finally, replace any component that becomes badly damaged, corroded or insecure. Stop using the appliance if smoke or combustion gases escape from the door or a joint.

Product Guides

• Download the VIT-Smooth brochure
• Read our guide: What is the best black stove pipe?
• Shop 150mm (6-inch) vitreous enamel stove pipe

Why Buy from SNH Tradecentre?

• Competitive prices: We offer excellent value across our stove, chimney and flue range.
• Helpful advice: Our team can help you compare bends, pipes, access fittings and adaptors.
• Genuine products: Buy from an established plumbing and heating merchant.
• Matching components: Choose from a wide range of 150mm VIT-Smooth products.
• Local collection: Collect eligible stock from our Birchington trade counter.
• UK delivery: Select from the delivery options available at checkout.
• Trade and public welcome: We supply installers, homeowners, landlords and property professionals.
• Customer support: Contact us before or after buying your flue components.

Need help checking whether this 33-degree elbow suits your stove? Call SNH Tradecentre on 01843 842727. If possible, have the stove make, model, outlet size and proposed flue route ready.

Read reviews from SNH Tradecentre customers on Google

Frequently Asked Questions

What is a 150mm 33-degree elbow with door?

It changes the direction of a 150mm connecting flue by 33 degrees. In addition, its built-in door provides access for inspection and sweeping.

What diameter is this elbow?

It has a nominal diameter of 150mm, which equals approximately six inches. It works with compatible 150mm VIT-Smooth components.

What does the access door do?

The door allows a chimney sweep to inspect and clean the inside of the elbow. Therefore, it provides useful access at the change in direction.

Can I use the appliance with the door open?

No. Always close and secure the door before lighting the appliance. Otherwise, smoke and harmful combustion gases could enter the room.

Does the door provide access to the whole chimney?

Not always. It provides access at the elbow. However, the installer and chimney sweep must confirm that they can reach every part of the complete flue.

Can I use two 33-degree elbows to create an offset?

Yes, two matching elbows can create an offset. However, the distance between them will change the final sideways movement. Therefore, check the dimensions before ordering.

What is the difference between a 33-degree and 45-degree elbow?

A 33-degree elbow creates a gentler change in direction. In contrast, a 45-degree elbow creates a larger offset over the same pipe length.

Can it connect directly to my stove?

Not always. Stove outlets can use different sizes and joint shapes. Therefore, you may need a suitable stove adaptor or connecting pipe.

Can I use it with a wood-burning stove?

Yes, you can use it with compatible wood-burning and multifuel stoves. However, always check the appliance instructions before ordering.

Can I use it with gas or oil appliances?

Yes, it also suits compatible gas and oil appliances. Nevertheless, the appliance instructions must allow the proposed flue size and layout.

Which way up should I install it?

Point the male or smaller end downwards towards the appliance. Then, connect the upper end towards the chimney.

Can the elbow pass through a wall or ceiling?

No. This single-wall elbow must not pass through walls, ceilings, floors, roofs or concealed spaces. Instead, use a suitable insulated chimney system.

How far must it remain from combustible materials?

Keep at least 450mm between the elbow and combustible materials. However, follow a greater distance if the appliance instructions require one.

Does the joint need fire clay?

No. VIT-Smooth uses friction-fit joints. However, follow the current instructions for any approved sealant or jointing compound.

Can I cut the elbow?

Avoid cutting the formed elbow. Never cut through the bend, access door or door frame. Instead, use a suitable fixed or adjustable pipe to alter the flue length.

What is the maximum operating temperature?

The elbow carries a T600 classification. Therefore, it has a maximum continuous operating-temperature classification of 600°C.

What does G450 mean?

The letter “G” shows soot-fire resistance. Meanwhile, 450 states the declared distance from combustible materials in millimetres.

Who should install this flue elbow?

A competent installer should fit the component. For solid-fuel installations, use a HETAS-registered installer or contact Building Control where required.

Manufacturers can update dimensions and installation instructions. Therefore, check the latest VIT-Smooth literature and confirm appliance compatibility before ordering.