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Baxi FULL SET 4x Bricks 16" AND 18" (Top, Bottom & Sides) - 003913

Baxi FULL SET 4x Bricks 16" AND 18" (Top, Bottom & Sides) - 003913
Baxi FULL SET 4x Bricks 16" AND 18" (Top, Bottom & Sides) - 003913 Baxi FULL SET 4x Bricks 16" AND 18" (Top, Bottom & Sides) - 003913
Brand: Baxi
Product Code: 003913
Availability: In Stock
Price: £108.50 Excluding VAT Price: £90.42

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44 reviews  44 reviews  


FULL SET of BAXI Firebricks - 003913 - 4 x Bricks in total (Side Cheeks both Left & Right and Top & Bottom Back Bricks) to suit Baxi 'STANDARD' & 'BURNALL' 16 inches & 18 inches (with bull nose front edge).

Input MIN Order Quantity to obtain web discount: 1 unit(s). Total quantity of units included in ABOVE displayed price: 4 Bricks.

This set of Bricks is just on the couriers maximum weight, so anything being bought in addition to this set will attract a second delivery charge (as two parcels sent).  To check cost of shipping before buying, go to shopping cart and click 'estimate shipping & taxes'

HOW TO MEASURE YOUR EXISTING OPENING: 16 & 18 Inch refers to the fire width opening. Measure the Front Fret (Fire Front), the metal piece that sits across the opening of the fire between the Hearth and the Grate.  This listing will create a 16" or 18" fire opening. The 2" difference depends how you fit the rear bricks.  Call us if you need more information 01827 713322.  Click the small picture icon to see brick sizes.

Fits Baxi Models

Baxi 16" Standard Fire, Baxi 18" Standard Fire, Baxi 16" Burnall Fire, Baxi 18" Burnall Fire

Side Cheeks Function:

The Baxi Side (Left / Right) & Back (Top & Bottom) Bricks assist in reflecting the heat into the room. If a Fire Brick is cracked or damaged it is recommended that it is replaced or repaired otherwise it will quickly disintegrate. Some Baxi underfloor draught fires are installed with domestic output back boilers, if so, they do not have back firebricks, if installed with a high output radiator heating boiler then they do not have side fire cheeks or back bricks. Contact us if you require help.

Jargon Buster:

The Bricks are mostly known as 'Fire Bricks' or 'Back Fire Bricks'

Other Related Useful Products:

We also stock the Fire Cement that will be required when changing your Firebricks - see other listings or contact us.

Fitting Instructions from an INSTALLERS point of view

The below has been created by an INSTALLER, Who has provided his account of how to fix the bricks. If the bricks are not fiited correctly, they may crack. Please always ensure a proffessionally registered HETAS installer fits or signs off any DIY work.





Before you start it’s a good idea to take photos of the installation as it is, just as a reminder.

Remove old bricks and about 2” of the surrounding infill material, to allow you space to manoeuvre the new bricks.

Clean off the top basket (the frame where the bricks sit), fit the bottom back brick and the 2 side bricks, ensuring you can still remove the grate and ash pan ( they interlock using the bullnose on the back of the side bricks and the grooves in the bottom back brick). Fit dry with no jointing material.

Around the back of the back brick and side bricks insert a layer (or 2) of corrugated card board, against the brick. Between the cardboard and the surrounding chamber, infill with vermiculite concrete (6 parts vermiculite to 1 part cement, with just enough water so it holds together when a handful is squeezed) Pack the space up to the top of all 3 bricks, leaving no spaces. Make sure you have a 10-15mm gap at the front edge of the side bricks, where they butt up to the back of the fireplace, to enable the expansion joint to be fitted later, once set.

Here comes the tricky bit!

You may have to remove some more of the surrounding infill material to the sides above where the top back brick fits, as the top brick fits on top of the bottom brick and behind the side bricks, you have to feed the top brick into space on one side to be able to push it through the gap. Once through it needs pulling back so it is equi-distanced behind the 2 side bricks, now it is in the correct position it should lie flat against the slope on the side bricks.

As before you will need to insert a layer of corrugated cardboard behind the top brick, and the vermiculite infill material, to within about ½” of the top of the space. The remaining space can be filled with a very weak mix of sand & cement 10:1, to smooth off the pargetting (the slope running about 45deg into the base of the chimney) this mix can also be used to fill any gaps above the bricks that may have become disturbed.

*It is a good idea to try all the bricks in position dry first, before using the infill material to ensure you have knocked out enough space to manoeuvre the bricks as you don’t really want to be knocking out more rubble when you are half way through the job!

Once set (24-48 Hours) insert the rope expansion joint to the front edge of the side bricks, use a rope that is a larger diameter than the gap so it can be caulked into the space. Do not be tempted to point up any joints with cement or fire cement as the dry joints will act as another expansion joint and allow the bricks to move.

ORIGINAL Baxi FITTING INSTRUCTIONS for Baxi Burnall Firebricks

It is imperative that the Baxi Bricks are fitted correctly, if not, they can easily damage or crack due to expansion & heat. See the attached document for the ORIGINAL BAXI FITTING INSTRUCTIONS as supplied by Baxi.

Click to view attached document

Mainland UK & Ireland Delivery | Replacement Stove Parts

  • EXACT Delivery Costs displayed in Cart & Checkout
  • Quoted Delivey is 'Door to Door' - UK Mainland (Zone 1) we use NEXT DAY Couriers
  • Deliveries Monday to Friday (working hours only)
  • BIG 30kg per parcel max weight
  • Most UK Courier costs are subsidised by from our product profit
Mainland England (Zone 1): 2 - 3 Working Days
We send orders by NEXT WORKING DAY COURIER..  We quote 2 - 3 TOTAL working days for delivery (door to door) which includes order process & packing time within the warehouse and allows for any potential delays. 

Scotland (North) & Highlands (Zone 2): 2 - 5 Working Days

Fireparts have recently reduced the postage to Scotland, we and our suppliers are subsidising this heavily from our own profits.  We will have reduced courier costs since mid 2022 and will continue to do so for as long as possible.

Scottish Highlands - AB36-38, AB55-56, FK17-21, IV1-39, IV52-54, IV63, KW1-14, PA21-40, PH19-26, PH30-41, PH49-50
Scottish Islands - HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3

Northern Ireland (Zone 3): 3 - 5 Working Days
Quoted slightly longer, occassionally can be Customs paperwork delays at boarder. 
Islands: Guernsey, Jersey, IOM, Silly & Isles of White (Zone 3): 3 - 5 Working Days
For NON VAT countries (Guersey & Jersey & IOM) submit order on website (DO NOT PAY, select PAY LATER option).  We will then deduct VAT and send you an invoice for payment..  Isle of White Customers VAT is still chargable so can be processed & paid on website as normal.

Ireland (Zone 4): 5 - 10 Working Days

CALL US! to place an order. We need to check the products you require are available for shipment to Ireland.  We will send you an invoice with VAT deducted.

IRELAND (EU): We are taking orders to Republic of Ireland based on a 'best endeavours basis'.  Due to our internal processes, there will be some products we cannot ship to Ireland.  Customers wishing to place an order to Ireland should email us advising the parts required we will then check the parts are available to ship to Ireland.  You may also PLACE AN ONLINE but DO NOT PAY and SELECT 'PAY LATER'.  If ok to ship, we will send you an invoice for payment (deducting VAT).  We would estimate around 10 - 15.  The buyer will be responsible for payment of any import tax via Customers, the Courier will contact you for payment seperately when the parcels reach Ireland depot.
For more detailed packaging and processing information See FULL DELIVERY


Don't worry if you order the incorrect part, notify us within 7 days and return within 14 days.  If we have advised you that your part is a SPECIAL ORDER then there may be a restocking | handling fee. Click for information about HOW TO RETURNDO NOT return any parts to our registered office address in COVENTRY, this is not our warehouse and deliveries will be rejected by the admin team.

To return an item complete the RETURN FORM. We will then advise you a return address for your item.