I just googled it and first one that came up was 1" female x 22mm. The top outlet on your tank looks like 1" (hard to tell exactly from a photo), if so it will go straight on.Do they have different size flanges then?
If you can get hold of a 3/4" female x 1" male fitting that would do it, but I just searched a few places with no success.Thanks for that - I believe the Salamander S Flange that I bought was the one that you are referring to with 1" female thread nut and male thread. The top of my cylinder is definitely ¾" as the female thread nut just sits on top with room to spare, so I have taken it back to Screwfix. I shall go to a plumbers merchant and see if they can help.
The cold feed flow to the HW tank must equal the total drawoff rate, via the pump and the top gravity connection. Whichever of the 2 options you use for the pump feed makes no difference.What happens to the vent pipe and supply to house? (which is in the last photo)
The instructions supplied with the pump will tell you what they recommend,often in pictures.so if they do not mention or show the vent being used then its not recommended.do I purchase an Essex flange to replace the factory fitted outlet or take it from the top outlet which I assume is the vent to the cistern and hot water to the rest of the house?
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