Junkers Drain Key Tap Safety Valve Eurosmart ZWA 24 1 AM Ref. 87161034890
The Junkers drain key Eurosmart ZWA 24 1 AM is a safety valve that is responsible for releasing water when the circuit pressure exceeds the usual limit of 3 bar. When this part fails, you may notice that it drips continuously or that it does not discharge water when it should. It is compatible with several models from the Junkers range, such as the Eurosmart ZWA 24-1 AM 23 and the Eurosmart ZWA 24-1 KM 31, among others. It is recommended to replace it when it shows leaks or does not function properly.
VAT included
Consult via WhatsAppJunkers boilers compatible with reference 87161034890
Safety valve with reference 87161034890. Four confirmed compatibilities: Eurosmart ZWA 24-1 AM 23 (S2800) and Eurosmart ZWA 24-1 AM 31 (S2800).
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers Eurosmart ZWA 24-1 AM 23 (S2800) | Junkers | Contrasted |
| Junkers Eurosmart ZWA 24-1 AM 31 (S2800) | Junkers | Contrasted |
| Junkers Eurosmart ZWA 24-1 KM 23 (S2892) | Junkers | Contrasted |
| Junkers Eurosmart ZWA 24-1 KM 31 (S2892) | Junkers | 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 the ref. 87161034890 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 87161034890. If it is not visible, do not identify the part from 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 and faults that the safety valve 87161034890 resolves.
The safety valve releases pressure when the circuit exceeds its setting. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
Water is constantly dripping from the drain tube of the valve, even when the boiler is cold.
Cause: The valve seat does not close properly, either due to wear or because a limescale particle is preventing the seal.
Pull the bleed lever for a few seconds to flush out any possible debris and check if the dripping stops.
- 02
The valve leaks water just when the boiler heats up strongly or reaches a high temperature.
Cause: The pressure in the circuit rises above the valve limit, often because the expansion vessel no longer absorbs that increase properly.
Check the pressure gauge when cold and hot; if it rises significantly when heating, first check the expansion vessel and its charge pressure.
- 03
No water comes out when pressing the manual bleed lever.
Cause: The internal mechanism is jammed, usually due to limescale or because it hasn't been activated for a long time.
Operate the lever carefully several times; if it doesn't release a single drop, the valve is not fulfilling its safety function.
- 04
There are stains of limescale or rust underneath the gas valve, although it is not currently dripping.
Cause: It has been intermittently bleeding in the past, indicating that the seat is already failing from time to time.
Clean the area and monitor it for a few days with the boiler in normal operation to confirm if the dripping reappears.
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.
Data sheet for the Junkers safety valve 87161034890
- Catalogue reference
- 87161034890
- Brand
- Junkers
- Type of part
- Safety valves
- Units in stock
- 7 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Junkers Eurosmart ZWA 24-1 AM 31 (S2800) manual (PDF)Document © Junkers, provided as a technical reference.
Frequently asked questions about the safety valve 87161034890
Which models is the Junkers drain key Eurosmart ZWA 24-1 AM Ref. 87161034890 compatible with?
Is this safety valve suitable for my Junkers ZWA 24-1 AM boiler?
Can I use the same gas valve for a KM model and an AM model from the Eurosmart range?
What is the reference for the safety valve I am considering?
Are there documented fault codes for this safety valve?
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