Atag automatic air vent + water trap: original Atag spare part, type: Air vent, Water trap. Application: Boiler (Blauwe Engel CMA 350). Manufacturer number: S4175410; Instalpunt article number: 8130205.
According to the Atag parts lists, this part fits 25 models, including Atag Blauwe Engel CMA 350, Atag Blauwe Engel CMA 650 and Atag Blauwe Engel CMA 950. The full list is under “Fits”.
This item is in stock and usually arrives within 3–5 working days.
Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer. Work on gas-carrying parts must be carried out by a qualified gas engineer.




