How do I know if this 3-way valve is for my boiler?

Verify the reference 8708505014 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Junkers/Bosch part.

The 3-way valve diverts the water between the heating circuit and the domestic hot water (DHW) circuit.

Does it provide hot water but not heat the radiators (or vice versa)?

Typical symptom that the valve or its motor is not switching; check the actuator motor and ensure the body is not seized.

Which models is it suitable for?

Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.

Installation and recommendations

Check if you need the motor, the body, or the complete assembly.

What does refurbished mean and what coverage does it have?

Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

RefurbishedJunkers 3-way valves

3-Way Valve Junkers Novastar ZW20 1AME23S2805 Ref. 8708505014

Name: 3-Way Valve Junkers Novastar ZW20 1AME23S2805 Ref. 8708505014
Brand: Junkers
SKU: EVNZW20
Price: 65 EUR
Availability: InStock

65 €VAT includedIn stock · 5 units

3-way valve: reconditioned spare part that diverts water between heating and domestic hot water. Useful if it provides hot water but does not heat radiators, or vice versa. Compatible with ZW20-1AME, ZW20-1KD, ZW20-1KE (ref. 8708505014). Includes a one-year warranty and delivery within 2–4 working days in the EU.

Consult via WhatsApp

Not sure if it's your part? Send us a photo of the screen printing via WhatsApp and we'll confirm compatibility before you purchase.

Delivery in 2–4 working days

1-year warranty

14-day return

Technical support

Key Data

Reference: 8708505014
Brand: Junkers
Type of part: 3-way valves
Available units: 5 units in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

The same part (ref. 8708505014) equips these models. Verified compatibility; check the reference before purchasing.

Junkers ZW20 (Novastar)

ZW20-1AME
ZW20-1KD
ZW20-1KE
ZW20-2AME
ZW20-2KD
ZW20-2KE
ZW20AME
ZW20KD
ZW20KE

Junkers ZW23

ZW23AE
ZW23KE
ZW23-1AE

How do I know if this 3-way valve is for my boiler?: Verify the reference 8708505014 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Junkers/Bosch part.
What is it used for?: The 3-way valve diverts the water between the heating circuit and the domestic hot water (DHW) circuit.
Does it provide hot water but not heat the radiators (or vice versa)?: Typical symptom that the valve or its motor is not switching; check the actuator motor and ensure the body is not seized.
Which models is it suitable for?: Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.
Installation and recommendations: Check if you need the motor, the body, or the complete assembly.
What does refurbished mean and what coverage does it have?: Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

3-Way Valve Junkers Novastar ZW20 1AME23S2805 Ref. 8708505014

Key Data

Junkers ZW20 (Novastar)

Junkers ZW23

Spare Parts Related Boiler Novastar ZW20 1AME23S2805