Gas Valve 830 TANDEM 83AP7050/4 For Baxi Solo, Ideal 836/837 And Vokera

The gas valve 830 TANDEM 83AP7050/4 regulates and allows the flow of gas to the burner of the boiler under the command of the PCB. When it fails, the boiler does not ignite, there may be flame lockouts, or it shows poor modulation. It is compatible with Baxi Solo WM20/4 RS, WM30/4 RS, WM40/4 RS, WM50/4 RS, WM60/4 RS, Ideal 836 and 837, and Vokera boilers. A technician must confirm through diagnosis whether it needs to be replaced if you are experiencing these issues.

Type of part: Gas valves
Status: Refurbished
internal SKU: VGASTY300
Warranty: 1 year

VAT included Stock · 3 units

Compatibility

Baxi boilers compatible

Gas valve. Eight confirmed compatibilities: Solo WM20/4 RS and Solo WM30/4 RS.

Proven compatibility

Boiler model	Family	Verification
Baxi Solo WM20/4 RS	Baxi	Contrasted
Baxi Solo WM30/4 RS	Baxi	Contrasted
Baxi Solo WM40/4 RS	Baxi	Contrasted
Baxi Solo WM50/4 RS	Baxi	Contrasted
Baxi Solo WM60/4 RS	Baxi	Contrasted
Baxi 836	Ideal	Contrasted
Baxi 837	Ideal	Contrasted
Baxi (valve reference 2139, replaces 2897)	Vokera	Contrasted

Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.

Guide

How to check if it is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

Find the reference printed on the installed part and check whether it matches the catalogue reference —. If it is not visible, do not identify the part by its shape alone.
Check the full boiler model on its data plate and look for it in the model associations on this page.
Compare the connections and physical body with the original part before installation.
If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Diagnosis and fault codes

Symptoms that require diagnosis in the gas valve

The gas valve regulates and modulates the gas flow to the burner. These are the typical symptoms and what to do:

Common symptoms and faults

01
The boiler does not ignite or locks out immediately upon trying.
Cause: The solenoid valves do not allow gas to flow to the burner when the control board gives the command.
Check that 220/240V power is reaching the gas valve at the moment of ignition before replacing it.
02
Sometimes it starts without any issues and other times it fails, without any changes in the installation.
Cause: If one of the solenoid valves fails intermittently, the ignition will be irregular.
Repeat several consecutive ignitions and note if the fault shows any pattern before declaring the gas valve defective.
03
It smells like gas near the valve, or it is noticeable that it doesn't close completely.
Cause: One of the solenoid valves does not close completely and allows some gas to pass through.
Apply soapy water to the body of the gas valve with the boiler turned off to locate the exact point of the leak before replacing it.
04
The flame varies in size on its own, rising and falling without touching the thermostat.
Cause: The pressure regulator in the gas valve does not maintain a stable output pressure to the burner.
If possible, measure the outlet pressure with a manometer before replacing the complete gas valve.

These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.

Technical data

Technical sheet: Baxi gas valve

Uniclima internal SKU: VGASTY300
Brand: Baxi
Type of part: Gas valves
Units in stock: 3 units
Status: Refurbished
Warranty: 1 year
Shipping: Delivery time shown at checkout
Return: 14 days

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Model: 830 TANDEM
Code: 83AP7050/4
Secondary code: 1017720 / 0164
Additional code (Cod.): 9B30834, Series/Class 141S
Solenoid valves EV1/EV2 (or EV3): Class B, 220/240V~ 50Hz, 7.7/10.8VA
Nominal flow rate (Qn): 4.8 m³/h
Input pressure (P1): 60 mbar
Modulation range (Pn): 2-50 mbar
Gas certification: ALLGAS

Documentation

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

Saunier Duval Solo WM50/4 RS Manual (PDF) Document © Saunier Duval, provided as a technical reference.

Frequently Asked Questions

Frequently asked questions about the gas valve

Does this valve fit my Vokera boiler?

There is a reference associated with Vokera, 2139, which replaces 2897, according to the available compatibility list.

How many solenoid valves does the gas valve of the Ideal 836 have?

Two, EV1 and EV2 (also marked as EV3 in the silkscreen), both at 220/240V 50Hz.

Is the 830 TANDEM valve suitable for the Baxi Solo WM60/4 RS?

Yes, it is among the Baxi Solo WM20/4 RS, WM30/4 RS, WM40/4 RS, WM50/4 RS, and WM60/4 RS boilers listed as compatible.

How many models are compatible with the gas valve VGASTY300?

A total of 8 models are compatible according to the compatibility table.

What fault codes does the gas valve 830 TANDEM have?

There are no documented fault codes.

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Gas Valve 830 TANDEM 83AP7050/4 For Baxi Solo, Ideal 836/837 And Vokera