Wilo RS15/6 Circulating Pump for Wolf GG-2EK 24 / TGG-K
Circulating pump manufactured by Wilo, model RS15/6 (code 4505132), installed in Wolf boilers from the GG-2EK, GU-2EK, and TGG-K/TGU-K ranges. It circulates the water in the heating circuit. Operates at 230V/50Hz, PN10, 0.36A, and 83W at 2400 min-1. It is replaced when it fails, makes noise, or the circuit stops circulating.
VAT included
Consult via WhatsAppWolf boilers compatible with reference 8601873
Circulating pump with reference 8601873. Ten verified compatibilities: GU-2EK-18 and GU-2EK-24.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Wolf GU-2EK-18 | GU-2EK | Contrasted |
| Wolf GU-2EK-24 | GU-2EK | Contrasted |
| Wolf GU-2EK-18-S2001 | GU-2EK | Contrasted |
| Wolf GU-2EK-24-S2001 | GU-2EK | Contrasted |
| Wolf GG-2EK-18 | GG-2EK | Contrasted |
| Wolf GG-2EK-24 | GG-2EK | Contrasted |
| Wolf GG-2EK-18-S2001 | GG-2EK | Contrasted |
| Wolf GG-2EK-24-S2001 | GG-2EK | Contrasted |
| Wolf TGU-K | TGU-K | Contrasted |
| Wolf TGG-K | TGG-K | 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 ref. 8601873 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 8601873. 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 circulation pump 8601873 resolves.
The circulation pump circulates the water in the heating circuit. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler turns on but heats less than usual.
Cause: The pump does not move the necessary flow and the heat is not distributed well.
Check the selected speed on the pump: sometimes you just need to raise the level before changing it.
- 02
Vibration noise noticeable even in the piping, not just in the pump
Cause: It could be due to air in the circuit or a worn bearing in the pump.
Bleed the radiators and the highest point of the system before considering that the pump is faulty.
- 03
Moisture or dripping appears on the pump head, near the shaft.
Cause: The mechanical seal has lost its tightness over time.
Clean and dry the area; if the moisture returns within a few hours in the same spot, it is the seal.
- 04
The radiators are cold even though the boiler is operating and burning normally.
Cause: If the pump does not move water, the heat generated does not leave the primary circuit.
Make sure that the shut-off valves before and after the pump are fully open.
Fault codes for Wolf that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 41 | Flow monitoring: the control detects an anomaly in the flow/return in the circuit. | If the circulating pump does not start, is seized, or performs poorly, the flow rate drops and the electronics detect rapid temperature inversion/drift; check voltage at terminals, consumption/rotation, and bleed the circuit. |
| 1 | TB Overtemperature: the boiler temperature limiter has activated due to excessive temperature. | With the pump stopped, blocked, or with very low flow, the heat is not evacuated and the boiler triggers the TB; check the pump start/speed, shaft/rotor, and ensure the return is open. |
| 6 | TW Overtemperature: the flow/return temperature has exceeded the safety threshold. | Pump fault or low performance causes lack of circulation and overheating (TW); check that the pump is rotating and increase its speed/flow after bleeding and checking the bypass. |
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 Wolf circulator pump 8601873
- Catalogue reference
- 8601873
- Brand
- Wolf
- Type of part
- Pumps
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- manufacturer
- Wilo
- code
- RS15/6 (4505132)
- voltage
- 230V
- frequency
- 50 Hz
- capacitor
- 2.5 µF - 400VDB
- Nominal pressure
- PN10
- protection
- IF44, Class F, TF110
- speed
- 2400 min-1, 0.36A, 83W
- Barcode
- 20151009409038
- The actual manufacturer of the pump is Wilo, not Wolf; Wolf installs it in their boilers but does not manufacture it.
Frequently asked questions about the circulator pump 8601873
Is this the original pump installed in the Wolf GG-2EK 24?
Which Wilo code should I check on the pump of my Wolf TGG-K?
Is this Wilo RS15/6 pump suitable for a Wolf GU/GG-2EK-18/24?
What power and current does the pump of the Wolf GG-2EK-S2001 consume?
