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National Boiler Spares

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National Boiler Spares

Best prices on quality heating parts, fast shipping!

19/03/2026

Engineers – here are 5 commonly ordered boiler parts this week.

🔧 Duca for Baxi Boiler Pump Head 15-50
SKU: N9167-D

🔧 Baxi Potterton Main Boiler Filling Loop
SKU: N9273

🔧 Baxi Main Potterton Pump (15-60)
SKU: N4944

🔧 Vaillant Boiler Sealing Gasket
SKU: N8933

🔧 Baxi Potterton Diverter Valve Cartridge
SKU: N2389

Search the SKU on nationalboilerspares.co.uk
or use the link in bio.

12/03/2026

Did you know? A sticking boiler cartridge can look like an actuator fault - the motor moves, but the flow still won’t divert properly.

Seen any of these on site: hot water going warm–cold–warm, or rads heating up during DHW?

Read the full guide via the link in bio!

11/03/2026

This week’s Top 5 boiler spares (SKUs below):

Worcester Greenstar Boiler Fan 87161160670 / 8716118443 (Type 1) — SKU: N0581-1

Worcester Boiler Return-Unit Manifold 87161064420 — SKU: N9098

Vaillant 3 Way Diverter Valve 0020020015 — SKU: N5827

Baxi Potterton Actuator Motor and Cartridge 7216534 — SKU: N8762

Universal Expansion Vessel Repair Kit (Short, 140mm) — SKU: N2249

Search the SKU on nationalboilerspares.co.uk (or use the link in bio).

25/02/2026

Top 5 boiler spares this week:

N8933 – Vaillant Sealing Gasket
N8859 – Vaillant 3 Bar PRV
N8973 – Ideal Ignition Unit
N9098 – Worcester Return Manifold
N8651 – Baxi Diverter Valve Motor

Search the SKU on nationalboilerspares.co.uk
Link in bio.

16/02/2026

This week’s Top 5 boiler spares 👇

Ideal Fan 175569 – N1622-1
Ideal Ignitor 175593 – N8973
Baxi/Main/Potterton Pump 15-60 – N4944
Vaillant Gasket 0020038679 – N8933
Vaillant Diverter Repair Kit – N3820

Search the SKU on nationalboilerspares.co.uk
Link in bio.

11/02/2026

This week’s most requested boiler spares ⬇️

• Baxi / Potterton Plate Heat Exchanger (20 PL)
SKU: N0808

• Vaillant Boiler Sealing Gasket
SKU: N8933

• IDEAL Diverter Valve Cartridge with Motor
SKU: N5422

• Baxi Duo Tec Megaflo 2 Neta-Tec PCB
SKU: N0877-1

• Ariston E-Combi Pressure Valve
SKU: N3936

Search the SKU on nationalboilerspares.co.uk or use the link in bio.

05/02/2026

Did you know?
Hot water but no heating (or the other way round) is often a stuck diverter valve.

It’s a common issue – especially on combi boilers.

👉 Read the full guide:
https://nationalboilerspares.co.uk/fixing-a-stuck-diverter-valve-in-boiler/

02/02/2026

This week’s Top 5 boiler spares 👇

• Worcester Boiler PCB 87483005550 / 87483004840
SKU: N1134-1

• Vaillant EcoTec Plus & Pro Thermal Fuse Sensor (F76 Fault)
SKU: N9002

• Baxi Potterton Hydraulic Outlet Assy Diverter Valve 7224344 / 248061
SKU: N1339

• Worcester Greenstar Boiler Fan Type 1
87161160670 / 8716118443
SKU: N0581-1

• Worcester Greenstar System ERP Fan Assembly
8716117417 / 8716122764
SKU: N6594-1

📦 In stock and ready to ship.
https://nationalboilerspares.co.uk
Search the SKU on nationalboilerspares.co.uk or use the link in bio

28/01/2026

This week’s top 5 boiler parts – in stock now 🔧

Engineers are regularly replacing these parts on site right now:

• Baxi 105 / Main / Potterton PCB (Type 1)
SKU: N0644-1

• Baxi Potterton 3 Bar Pressure Relief Valve
SKU: N1999

• Banico 3-Port Mid-Position Valve (22mm)
SKU: N6521

• Baxi Potterton Actuator Motor & Cartridge
SKU: N8762

• Baxi / Main / Potterton Boiler Pump (15-60)
SKU: N1364-1

✔ Fast UK delivery
✔ OEM, compatible & BSI-certified refurbished options
✔ Expert technical support

👉 View full range at nationalboilerspares.co.uk

22/01/2026

🛠️ Did you know?
If a boiler keeps losing pressure or dumping water through the PRV, the expansion vessel is often the real culprit.

When vessels fail, pressure has nowhere to go — leading to repeat call-outs and unhappy customers.

💡 Our guide explains how expansion vessels work and when replacement is the right fix.

👉 See the link to our news section in the bio to read the full guide or visit this link:

https://nationalboilerspares.co.uk/expansion-vessel-replacement-oem-parts/

19/01/2026

🧰 This week’s van-ready top 5 boiler parts

Fixing some of the most common winter call-outs 👇
Each part is listed with its fault + SKU so you can find it fast.

🔹 Weak or fluctuating hot water
Baxi / Potterton Plate Heat Exchanger (20 PL)
SKU: N0808

🔹 Pressure loss or PRV discharging
Baxi / Potterton / Main Expansion Vessel (8L) with PRV
SKU: N8279

🔹 PCB lockouts & control faults
Vaillant EcoTec PCB – Type 1
SKU: N1033-1

🔹 Fan faults & airflow errors
Worcester Greenstar Boiler Fan – Type 1
SKU: N0581-1

🔹 No heating / hot water switching issues
Glow-worm 3-Way Plastic Diverter Valve
SKU: N5827-A

💡 We’ll be sharing a quick guide on expansion vessel replacement later this week — ideal if pressure issues are a regular call-out.

🔍 Search SKUs on nationalboilerspares.co.uk
📦 Fast UK delivery | Trade-trusted support

Address

Tyne View Terrace
Wallsend
NE286SG

Opening Hours

Monday	8:30am - 5pm
Tuesday	8:30am - 5pm
Wednesday	8:30am - 5pm
Thursday	8:30am - 5pm
Friday	8:30am - 5pm
Saturday	8:30am - 12pm

Website

https://nationalboilerspares.co.uk/

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