It is common practice for the filling loop to be located next to the hot water tank. Re-pressuring is not an impossible task, however, it can be a hard one, especially if you have an internal filling key. If in doubt, you can visit the manufacturers website and get in touch with them directly. Make sure to keep a close eye on your boiler. The volume of your system is fixed, so adding more water increases the pressure. Finance options are offered subject to status and credit check which must be completed before commencement of works. Your manual can be a reference. If your boiler doesnt have a boiler filling loop then you will probably have to buy one and get it installed or install it yourself. When your filling loop connects your boiler and mains there is always a chance for a backflow it doesnt matter whether your boiler filling loop is in on or off position. Remove your external filling loop, put the cap back on the isolation valve, and everything should be back up to scratch. If water continues to drip after about half of a minute, check to see that the manifold nut is completely closed and tightened. Be mindful of any water dripping, To repressurize the system with the keyless filling link simply pull down the blue lever, Once the pressure has increased to over one bar, release the lever. "}},{"@type":"Question","name":"What happens if you over-pressurise your boiler? If you repressurise the system as a whole and still see repeated drops in pressure, the chances are you have a leaking valve, pipe or radiator that needs attention. When it comes to the installation of your filling loop, it depends on what kind you have. Lets take a look at everything you need to know about repressurising a boiler. If you get stuck while trying to re-pressurise your Viessmann boiler, you can alwayscontact us for support. No Deposit ONLINE QUOTE NOW. Check the pressure gauge until it reaches the right range, usually 1-1.5 bar (keep it green). The boiler was only installed in April so it's well within its warranty. Not all boilers are compatible with a filling loop; this is particularly true for older combi boiler models. Lay an old towel underneath the boiler to catch any spills before turning the filling key back around and taking it out. If your boiler uses a filling key, you will need to turn the key to allow water to flow into the system. Make sure it is in the 1-1.5 bar range (green) before turning the lever to close. Here's how to repressurise a boiler using an external filling loop: Switch off your boiler and allow it to cool Attach the hose securely to the cold water valve and the boiler valve Once the filling loop is secured, open up the two valves, starting with the cold water and then the boiler The tank forms part of your overall heating system, and so topping it up will increase the pressure in the system, and therefore repressurise . 2. Turn off the boiler. They usually come as an additional attachment with the boiler. The metal part of the boiler is placed in the plastic cask. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/bf\/Repressurize-a-Boiler-Step-1.jpg\/v4-460px-Repressurize-a-Boiler-Step-1.jpg","bigUrl":"\/images\/thumb\/b\/bf\/Repressurize-a-Boiler-Step-1.jpg\/aid9295602-v4-728px-Repressurize-a-Boiler-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"