i can only get my HOTwater on if i have my heating on question should my expantion tank on back of boiler be full of water or full of air/?
-
Looking for a smarter way to manage your heating this winter? We’ve been testing the new Aqara Radiator Thermostat W600 to see how quiet, accurate and easy it is to use around the home. Click here read our review.
automatic air vent on valliant vcw t3w
- Thread starter pingg2
- Start date
If you can only get hot water with the heating on the most likely reason is the diaphragm in the water section is holded/worn.
The expansion vessel should contain air pressurised to about 0.7 Bar (with the system at zero pressure).
It is normal to have to drain a small amount of water out of the vessel on these older vaillant expansion vessels. These are high quality vessels and can easily give a service life of 20 years.
However more than a cupful may indicate a punctured vessel, in this case plumb in an additional vessel onto the system.
The expansion vessel should contain air pressurised to about 0.7 Bar (with the system at zero pressure).
It is normal to have to drain a small amount of water out of the vessel on these older vaillant expansion vessels. These are high quality vessels and can easily give a service life of 20 years.
However more than a cupful may indicate a punctured vessel, in this case plumb in an additional vessel onto the system.
Yep wax stat diverter, Vaillant managed to get the design right where Potterton didin't.
I often find the screw holding on the water section is seized due to a leaking stuffing box. A small flame off the blowlamp sometimes shifts it otherwise down the breakers yard for a lower section.
I often find the screw holding on the water section is seized due to a leaking stuffing box. A small flame off the blowlamp sometimes shifts it otherwise down the breakers yard for a lower section.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
