Refill Vaillant Boiler - help please!

[Dave1982]

I was hoping someone could help me with what I expect is a pretty basic query. My boiler has lost pressure & I need to refill it. Have searched online & watched videos, it seemed relatively straightforward with the videos showing a tap or screw being opened to allow the filling loop to let water into the boiler. However, my filling loop is shown on the attached & I can't work out how to open the filling loop to allow water into the boiler.

Boiler 1.jpg (181.52 KiB) Viewed 866 times

I am guessing that I need to open the left hand side as it looks like there is a thread for something in the hole just above where the filling loop connects to the pipe, but I cannot work out whether something is missing (such as a tap), whether a some kind of key needs entering into the hole (which I don't think I have) or whether the entire part needs turning with a wrench.

Any help would be gratefully received.

Thanks.

[Someone-Else]

A handle is missing, I know this because............

missing.jpg (60.06 KiB) Viewed 858 times

It looks just like mine.

It's supposed to have a handle like you find on a washing machine valve (The bit the hose connects to, one is red, the other is blue) But like mine, they often snap, so I just use an adjustable spanner. You turn the outer square part. There should also be another "handle" (usually bigger) on the other end of the braided pipe, but I can't see one in your picture.


Here is what my "filling loop" looks like from further back

other end.jpg (74.69 KiB) Viewed 856 times

I have to turn the black lever as well as the one with the missing handle

[dewaltdisney]

The valves probably had plastic taps that got soft and the square drive turned into an oval. I had my Vailllant filling loop taps replaced with metal ones which are far better. Use a square drive or a socket so the edges are preserved. I cannot see clearly if that is an isolator at the other end used to stop backflow?

DWD

[Dave1982]

Thank you both for your help - I now have hot water again!!