Water Fitting Junkers Bosch Euromaxx ZWC 24/28 and 28/32-1 MFA Ref. 87167713850
Water connector for Junkers Euromaxx ZWC 24/28 and 28/32-1 MFA boilers. Molded plastic part for Bosch Termotecnia (Junkers), without visible external manufacturer logo, only a mold number. Replacement requires first confirming the fault of the part through technical diagnosis, even when it loses tightness or cracks, causing water leaks in the hydraulic circuit of the boiler.
- Type of part
- Hydraulic units
- Status
- Refurbished
- internal SKU
- RAJEZWC28/32
- Warranty
- 1 year
Compatible Junkers boilers
Hydraulic group. Four confirmed compatibilities: 24/28-1 MFA 23 and 24/28-1 MFA 31.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers 24/28-1 MFA 23 | ZWC | Contrasted |
| Junkers 24/28-1 MFA 31 | ZWC | Contrasted |
| Junkers 28/32-1 MFA 23 | ZWC | Contrasted |
| Junkers 28/32-1 MFA 31 | ZWC | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
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.
Symptoms that require diagnosis in the hydraulic group
The hydraulic group includes the valve, the by-pass, and the water connections. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
Water or a damp ring appears right in the area where this fitting is located, especially when the boiler has been on for a while.
Cause: Plastic expands with heat, and if it is already cracked, that is when the leak is most noticeable.
With the boiler cold, dry the area well, turn it on, and observe if the leak appears when heating: that points directly to the fitting.
- 02
The fitting is cracked or the thread appears to be damaged at first glance.
Cause: Plastic loses flexibility over the years, and excessive tightening during a previous maintenance can cause it to crack.
Check it with a flashlight for fine cracks in the base and the thread before replacing it.
- 03
It only drips occasionally, not constantly.
Cause: A dry or displaced internal gasket seals worse when the circuit pressure increases.
Check the pressure gauge of the boiler: if the dripping increases with high pressure, the suspect is this fitting.
- 04
You have tightened the fitting and it is still leaking water.
Cause: If the crack already exists, tightening does not seal anything and may end up breaking the part completely.
Don't keep pressing: if you've already tried and the leak persists, it's time to replace it, not to force it any further.
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.
Junkers hydraulic group datasheet
- Uniclima internal SKU
- RAJEZWC28/32
- Brand
- Junkers
- Type of part
- Hydraulic units
- 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.
- Molded code on the part
- 8716771001/1
- The reference published by the store (87167713820) was incorrect; the correct one is 87167713850.
- The part does not have any visible manufacturer's logo, only a mold number; the Bosch Thermotechnology origin is determined by technical assessment, not by direct marking on the part.
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Junkers 28/32-1 MFA 31 manual (PDF) Document © Junkers, provided as a technical reference.
Frequently asked questions about the hydraulic group
Does this water fitting work for my Junkers Euromaxx ZWC 24/28-1 MFA 23?
Is the correct reference for this fitting 87167713850 or 87167713820?
Does the water fitting of the Euromaxx ZWC have the Bosch or Junkers brand engraved?
When should this fitting be replaced in a ZWC 24/28 or 28/32-1 MFA?
Spare parts related to Junkers ZWC
