There are a number of drain cocks fitted to the pipes on my central heating system, which enable a hose pipe to be pushed on and they give a nice tight fit - a jubilee clip isn't necessary.
However, the two drain cocks on the flow and return under my Vaillant ecoTec boiler have a screw thread and this is much narrower than a hose. I suspect a jubilee clip may hold the hose pipe onto this drain point, providing the hose is flexible enough to squash tight.
Is there a reason why the drain cocks on the boiler have this screw thread, rather than being like other drain cocks? Is it the same on all boilers or is this something that only Vaillant do.
It almost feels like something needs to be screwed onto the boiler drain cock, which then allows the drain pipe to be attached.
Just curious.
However, the two drain cocks on the flow and return under my Vaillant ecoTec boiler have a screw thread and this is much narrower than a hose. I suspect a jubilee clip may hold the hose pipe onto this drain point, providing the hose is flexible enough to squash tight.
Is there a reason why the drain cocks on the boiler have this screw thread, rather than being like other drain cocks? Is it the same on all boilers or is this something that only Vaillant do.
It almost feels like something needs to be screwed onto the boiler drain cock, which then allows the drain pipe to be attached.
Just curious.