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A.O. Smith gasket for inspection hatch (e.g. ST 300) 0303845(S)
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A.O. Smith gasket for inspection hatch (e.g. ST 300) 0303845(S)

€ 34.66 incl. VAT

Original spare part A.O. Smith. Type: Gasket. Application: Hot water cylinder / IT 300. Supplier code: 0303845(S).

SKU: 8750392 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 / modelST 300 and 2 other models
A.O. Smith number0303845(S)
Article number8750392
Not sure? Search by article or manufacturer number or check with the manufacturer or your installer.
All spare parts for A.O. Smith ST 300 →
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A.O. Smith gasket for inspection hatch (e.g. ST 300) 0303845(S): original A.O. Smith spare part, type: Gasket. Application: Hot water cylinder (IT 300). Manufacturer number: 0303845(S); Instalpunt article number: 8750392.

According to the A.O. Smith parts lists, this part fits 3 models, including A.O. Smith IT 300, A.O. Smith ITS 300 and A.O. Smith ST 300. 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 gasket for inspection hatch (e.g. ST 300) 0303845(S)

BrandA.O. Smith spare parts
A.O. Smith manufacturer number0303845(S)
Instalpunt article number8750392
EAN8717449198466
Part typeGasket (All A.O. Smith gaskets and seals · gaskets and seals of all brands)
ApplicationHot water cylinder
Suitable for3 A.O. Smith models (see list)
DeliveryIn stock, delivery in 3–5 working days
Price€ 34,66 incl. VAT
OriginSupplied through the official technical wholesale channel, under A.O. Smith number 0303845(S)

Also known as: seal, sealing ring.

Fits 3 A.O. Smith models

The part A.O. Smith gasket for inspection hatch (e.g. ST 300) 0303845(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 (3)

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.

Frequently asked questions about this item

Does the A.O. Smith gasket for inspection hatch (e.g. ST 300) 0303845(S) fit my appliance?
This part is in the parts list of 3 A.O. Smith models, namely the IT 300, ITS 300, ST 300. The model type is on the rating plate of your appliance. If in doubt, ask the manufacturer or your installer.
What is the delivery time for the A.O. Smith gasket for inspection hatch (e.g. ST 300) 0303845(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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