
Water Valve Manaut GLM5 13 20 Ref. 87167287510
Water Valve Biasi GLM5 13 20 Ref. 87167287510. This 3-way valve is responsible for directing water between the heating circuit and the domestic hot water circuit. If it fails, you will notice that you have hot water but no heating, or vice versa, or even that both circuits are mixing. It is compatible with boilers from the GLM5 range, such as the models GLM5.13, GLM5.20, and GLM5.13/20, among others. It is recommended to replace it when you observe these issues with hot water or heating supply.
VAT included
Consult via WhatsAppBiasi boilers compatible with reference 87167287510
Three-way valve with reference 87167287510. Three confirmed compatibilities: GLM5.13 and GLM5.20.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Biasi GLM5.13 | GLM5 | Contrasted |
| Biasi GLM5.20 | GLM5 | Contrasted |
| Biasi GLM5.13/20 | GLM5 | 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. 87167287510 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 87167287510. 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 3-way valve 87167287510 resolves.
The 3-way valve diverts water between heating and domestic hot water. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The hot water comes out in bursts, alternating between hot and cold every few seconds.
Cause: The valve shutter oscillates instead of settling in a stable position, and the flow is distributed unevenly among circuits.
Make sure that the mains water pressure is stable and sufficient; low or irregular pressure can cause the same symptom without the gas valve being faulty.
- 02
After using the hot water, the radiators take a long time to heat up again.
Cause: The valve takes time to return to the heating position because the return mechanism is worn or jammed.
Time how long it takes to start heating again after closing the tap and compare it with how long it took before the problem started, if you remember.
- 03
Water is leaking right in the area where the 3-way valve is mounted, between the two circuits.
Cause: The internal seals that separate heating and domestic hot water lose tightness with use and allow water to pass between both sides.
Dry the area, carefully tighten the nearby fittings, and wait for a complete cycle of the boiler to confirm that the leak is coming from the gas valve itself.
- 04
The boiler does not start the heating and a warning related to the circuit or flow appears on the screen.
Cause: If the PCB detects through the micro switch of the gas valve that it has not reached the heating position, it may block the start for safety reasons.
Note the exact code displayed on the screen; in many manuals, that specific code is associated with the 3-way valve or its micro switch.
- 05
A small motor can be heard working intermittently even though no one is requesting hot water or heating.
Cause: A micro switch or the motor itself may be trying to reposition the shutter because it does not stay fixed where it should.
Observe if the noise coincides with any specific cycle (starting, stopping, change in demand) to determine if it is intermittent or continuous.
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 3-way valve Biasi 87167287510
- Catalogue reference
- 87167287510
- Brand
- Manaut
- Type of part
- 3-way valves
- Units in stock
- 3 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days









