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Atag pump 15/40 domestic hot water S4738700

€ 346.07 incl. VAT

Original spare part Atag. Type: Pump. Application: Boiler / Q30CC | vanaf 2006 OSS2. Delivery time: on request (please contact us). Supplier code: S4738700.

Special-order item — delivery time on request (please contact us) — non-returnable

SKU: 8139584 Categories: , Brand:

Price and stock checked on 20 October 2026.

Made-to-order item — ordered specially for you, see delivery time below
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?
ApplicationBoiler
Series / modelQ30CC
Atag numberS4738700
Article number8139584
Not sure? Search by article or manufacturer number or check with the manufacturer or your installer.
Made-to-order item — this spare part is not on our shelf and is ordered specially for you from the manufacturer or wholesaler, delivery time on request (please contact us). Specially ordered items cannot be returned: the manufacturer or supplier does not take them back. So check the type number of your appliance and the article number of the spare part beforehand. In doubt? Check with the manufacturer or your installer (see also returns).
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Atag pump 15/40 domestic hot water: original Atag spare part, type: Pump. Application: Boiler (Q30CC | vanaf 2006 OSS2). Manufacturer number: S4738700; Instalpunt article number: 8139584.

According to the Atag parts lists, this part fits 1 model: Atag Q30CC | vanaf 2006 OSS2. The full list is under “Fits”.

Special-order item (delivery time on request (please contact us)): it is ordered specially for you from the manufacturer and is non-returnable.

Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer. Work on gas-carrying parts must be carried out by a qualified gas engineer.

Product information: Atag pump 15/40 domestic hot water S4738700

BrandAtag spare parts
Atag manufacturer numberS4738700
Instalpunt article number8139584
EAN8719638552318
Part typePump (All Atag pumps · pumps of all brands)
ApplicationBoiler
Suitable for1 Atag model (see list)
DeliverySpecial-order item, delivery time on request (please contact us)
Price€ 346,07 incl. VAT
OriginSupplied through the official technical wholesale channel, under Atag number S4738700

Also known as: cv-pomp, circulatiepomp.

Fits 1 Atag model

The part Atag pump 15/40 domestic hot water S4738700 is in the official parts list of this Atag appliance. Click a model for the complete parts list and exploded view.

Atag Boiler (1)

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.

For which fault is a Atag pump replaced?

According to the fault code database, these Atag 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
78Water pressure sensor out of range or not connected or, if water pressure is OK: pump defective.
104No pump kick
918Pump defective error
B1Temperature difference between flow and return too large. Insufficient flow or pump defective?
B6Return temperature higher than flow temperature. Circulation pump fitted the wrong way round?
BL 11Maximum Delta-T of flow and return sensor on CH repeatedly exceeded. Hot water operation remains possible during the block. During the block the pump keeps running at minimum capacity

All Atag 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.

Available: Pump for the same appliances

This part is currently out of stock. These Atag parts of the same type are listed for at least one of the same appliance models and are available.

Before ordering, check the manufacturer number in the spare parts list or exploded view of your appliance.

Frequently asked questions about this item

Does the Atag pump 15/40 domestic hot water S4738700 fit my appliance?
This part is in the parts list of 1 Atag model, namely the Q30CC | vanaf 2006 OSS2. 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 of this made-to-order item?
This is a special-order item: we order it specially for you from the wholesaler. The expected delivery time is on request (please contact us). You can also see the delivery time next to the stock status at the top of this page.
Can I return this made-to-order item?
A specially ordered item is not taken back by the supplier, so returns are not possible. So check the article number and the rating plate of your appliance beforehand. Is something wrong with your order? Then contact us via info@instalpunt.nl. The full terms and conditions are 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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