How do I know if this safety valve is for my boiler?

Verify the reference S5741900 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.

Is it dripping or continuously expelling water?

It could be excess pressure (expansion vessel) or the valve itself not closing.

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

Verify that the pressure setting in bar is correct for your boiler.

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.

RefurbishedSaunier Duval Safety Valves

Saunier Duval Domestic Hot Water (DHW) Safety Valve 10 Bar Metallic 10BAR Isofast 21 Condens Ref. S5741900

10 €VAT includedIn stock · 1 unit

Safety valve: reconditioned spare part that releases pressure when the circuit exceeds its setting. Useful if it drips or continuously expels water. Compatible with Isomax F28E, Isotwin C24E (ref. S5741900). 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: S5741900
Brand: Saunier Duval
Type of part: Safety Valves
Available units: 1 unit in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

The same part (ref. S5741900) equips these models. Verified compatibility; check the reference before purchasing.

Isomax

Isomax F28E

Isotwin

Isotwin C24E

How do I know if this safety valve is for my boiler?: Verify the reference S5741900 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.
What is it used for?: The safety valve releases pressure when the circuit exceeds its set point (e.g. 3 bar).
Is it dripping or continuously expelling water?: It could be excess pressure (expansion vessel) or the valve itself not closing.
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: Verify that the pressure setting in bar is correct for your boiler.
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.

Saunier Duval Domestic Hot Water (DHW) Safety Valve 10 Bar Metallic 10BAR Isofast 21 Condens Ref. S5741900

Key Data

Isomax

Isotwin

Spare Parts Related Metallic Boiler 10BAR Isofast 21 Condens