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Nefit backflow protection for e.g. WR 350-1 8738718428
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Nefit backflow protection for e.g. WR 350-1 8738718428

€ 112.02 incl. VAT

Original spare part Bosch. Type: Backflow preventer. Application: Water heater / Kelvin WR 11P (GWH 11P). Supplier code: 8738718428.

SKU: 8184127 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?
ApplicationWater heater
Series / modelWR 350-1 and 14 other models
Bosch number8738718428
Article number8184127
Not sure? Search by article or manufacturer number or check with the manufacturer or your installer.
All spare parts for Junkers (Bosch) WR 350-1 →
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Nefit backflow protection for e.g. WR 350-1 8738718428: original Nefit spare part, type: Backflow preventer. Application: Water heater (Kelvin WR 11P (GWH 11P)). Manufacturer number: 8738718428; Instalpunt article number: 8184127.

According to the Nefit parts lists, this part fits 15 models, including Bosch Kelvin WR 11P (GWH 11P), Bosch W 125 K TZ ZT1 and Junkers (Bosch) W 125 K TZ ZT1. 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. Work on gas-carrying parts must be carried out by a qualified gas engineer.

Product information: Nefit backflow protection for e.g. WR 350-1 8738718428

BrandBosch spare parts
Bosch manufacturer number8738718428
Instalpunt article number8184127
EAN4057749695918
Part typeBackflow preventer
ApplicationWater heater
Suitable for15 Bosch models (see list)
DeliveryIn stock, delivery in 3–5 working days
Price€ 112,02 incl. VAT
OriginSupplied through the official technical wholesale channel, under Bosch number 8738718428

Fits 15 Bosch models

The part Nefit backflow protection for e.g. WR 350-1 8738718428 is in the official parts list of these Bosch appliances. Click a model for the complete parts list.

Bosch Water heater (15)

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 Nefit backflow protection for e.g. WR 350-1 8738718428 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.

Frequently asked questions about this item

Does the Nefit backflow protection for e.g. WR 350-1 8738718428 fit my appliance?
This part is in the parts list of 8 Bosch models, including the Kelvin WR 11P (GWH 11P), W 125 K TZ ZT1, W 135 K TZ ZT1, W 275-1 KD0. 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 Nefit backflow protection for e.g. WR 350-1 8738718428?
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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