Flamco Flexvent 3/8" Floatvent c/w shut-off valve - Automatic Air Vent 27750

These are good bleed valves.

Purchased this to replace the old barrel design plastic air vent on my central heating system that was leaking. It took considerably more effort to bleed and refill the system (and getting rid of the subsequent air locks), than to fit this. A couple of layers of white plumbers tape, and it fitted perfectly without any leaks. It is clearly better built than the plastic valve as well, and operates much better. Although it doesn't come with any instructions, if you download the Flamco manual it recommends that you loosen the cap before filling the system and tighten afterwards. The location of the valve is critical as well, it should be on the highest point of the system after the water pump to prevent air being drawn into the system. While not a "Silver bullet" for a central heating system with an airlock issue, the Flamco was not designed to be that. There are many reasons for airlocks occurring in a domestic CH scenario, and an airvent valve may or may not be the solution. If you purchase it as a replacement part with this in mind, you won't go wrong.

Great Product and a flawless seller. Thanks very much. Saved me a few quid too :)

Does the job, fitted to the top of a wall heated towel rad, that got all the air buildup. So yes ok

Make sure you buy the right size according to your pipework and use case - there is a 3/8" and 1/2" version These are excellent at getting air out of the system and really work. I have an unvented cylinder in my loft and have fitted this on the primary circuit at the highest point in the system. You can hear it work on air immediately and my system has never had any air locks or required time consuming purging even after a full drain down and fill. I suggest using Loctite 55 instead of PTFE for sealing the thread.

Simple to install yourself, has a ptfe collar built in, tighten to the lip, but don't compress/overtighten the ptfe lip, so only needs a tiny 1/2 width tape over the thread

Great

I bought six of them and fitted with a professional instaler. One of them had a leak and I needed to drain the system again and instal a spare one from another manufacturer. They need to have a better quality control.

Excellente qualité, oubliez les autres marques! Celui ci tient à la chaleur contrairement à d’autres qui fuyaient en sortie de la chaudière bois (environ 90 degrés) Avec un peu de chance vous le payez 10/12€

Instalé estos purgadores automáticos en la instalación de mi caldera de gasoil hace ya varios meses y la experiencia está siendo muy positiva. Desde el primer momento se veía que constructivamente eran de buena calidad, bien acabados y robustos. Con el paso del tiempo lo he podido confirmar: después de varios meses funcionando, siguen trabajando perfectamente, sin fallos ni pérdidas. Cumplen su función sin tener que preocuparse de nada. Producto fiable y recomendable.

Prima ontluchter voor onze boiler en met een nette prijs

Gör sitt jobb

Se ha sustituido por otro igual de una caldera Roca. Buena calidad.