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A.O. Smith gas valve
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A.O. Smith gas valve 0300903(S)

€ 390.70 incl. VAT

Original spare part A.O. Smith. Type: Gas valve. Application: Hot water cylinder / ADM(C) 40. Supplier code: 0300903(S).

SKU: 8750266 Categories: , Brand:

Price and stock checked on 20 October 2026.

✓ In stock — delivery usually within 3–5 working days
EU delivery from € 17.95 · Shipping & payment

Price incl. VAT. Any delivery costs are calculated in the basket — see shipping & delivery.

Does this fit my appliance?
ApplicationHot water cylinder
Series / modelBFC 50 (up to 09-2009) and 13 other models
A.O. Smith number0300903(S)
Article number8750266
Not sure? Search by article or manufacturer number or check with the manufacturer or your installer.
All spare parts for A.O. Smith BFC 50 (up to 09-2009) →
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A.O. Smith gas valve: original A.O. Smith spare part, type: Gas valve. Application: Hot water cylinder (ADM(C) 40). Manufacturer number: 0300903(S); Instalpunt article number: 8750266.

According to the A.O. Smith parts lists, this part fits 14 models, including A.O. Smith ADM(C) 40, A.O. Smith ADM(C) 50 and A.O. Smith ADM(C) 60. The full list is under “Fits”.

In stock: order before 14:00 and it ships the same working day; delivery within the EU usually takes 3–5 working days.

Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer.

Product information: A.O. Smith gas valve 0300903(S)

BrandA.O. Smith spare parts
A.O. Smith manufacturer number0300903(S)
Instalpunt article number8750266
EAN8717449194468
Part typeGas valve (All A.O. Smith gas valves and gas control · gas valves and gas control of all brands)
ApplicationHot water cylinder
Suitable for14 A.O. Smith models (see list)
DeliveryIn stock, delivery in 3–5 working days
Price€ 390,70 incl. VAT
OriginSupplied through the official technical wholesale channel, under A.O. Smith number 0300903(S)

Also known as: gasklep, gasregelblok, gasventiel.

Fits 14 A.O. Smith models

The part A.O. Smith gas valve 0300903(S) is in the official parts list of these A.O. Smith appliances. Click a model for the complete parts list and exploded view.

A.O. Smith Hot water cylinder (14)

Check the rating plate of your appliance. Not sure whether this part fits? Check with the manufacturer or your installer; with the correct manufacturer number you can order it here directly.

Does this fit my appliance?

Enter your appliance type, for example as shown on the rating plate. You will see straight away whether the A.O. Smith gas valve 0300903(S) is in the parts list of that model.

Not found? Check the rating plate of your appliance or search by article number. If in doubt, just email info@instalpunt.nl.

Position on the parts diagram

This part appears on the exploded view of 11 appliances. Open the drawing for the appliance and click the number to check that you have the right part.

Also appears on the drawing of 5 other models.

For which fault is a A.O. Smith gas valve replaced?

According to the fault code database, these A.O. Smith fault codes point to this type of part. Always check first that the code matches the appliance type on the rating plate.

CodeWhat is going on
F07A flame was detected after the gas valve closed. Defective gas valves.
F08Safety relay error. Flame detected before the gas valve opens.
F10Limit on the number of ignition attempts based on switching of the flue damper relay. Flue damper relay switches during heat demand.
F11Flame detected with gas valve closed. Defective gas valves.
F13Flue damper is not driven by the motor. The motor does not open the flue damper.
F14The micro-switch does not detect the position of the flue damper.

All A.O. Smith fault codes explained

Indicative: the same code can have a different cause depending on the situation. Have work on gas, flue or burner adjustment carried out by a qualified installer.

Frequently asked questions about this item

Does the A.O. Smith gas valve 0300903(S) fit my appliance?
This part is in the parts list of 14 A.O. Smith models, including the ADM(C) 40, ADM(C) 50, ADM(C) 60, ADM(C) 80. The model type is on the rating plate of your appliance. Use the “Does this fit my appliance?” search box on this page to check your model. If in doubt, ask the manufacturer or your installer.
What is the delivery time for the A.O. Smith gas valve 0300903(S)?
This item is in stock. Ordered before 14:00, it ships the same working day and usually arrives within three to five working days.
Can I return this item?
Yes, unused and in the original packaging within 14 days of receipt. Unpacked or fitted items and electronics such as PCBs cannot be returned. How to register a return is explained on returns.
What does shipping cost?
Shipping costs € 17.95 to Austria, Denmark, Italy, Spain and Sweden and € 24.95 to other EU countries. In-stock items ordered before 2 pm are dispatched the same working day; delivery usually takes 3–5 working days. Details: Shipping.
I have a fault code, which part do I need?
Look up the code in the fault code finder: per brand and appliance it shows what the code means and which part goes with it. If the code is listed with this part, the part belongs to that fault.

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