While ppl are here I'm also brand new member looking for some info first how do I ask my own question without hijacking someone else's. Second I've fitted a single pump to the gravity fed tank because my hot water was terrible but it keeps drawing air in from tank. I was going to fit a s flange in top but can not fathom how the piping goes as the s flange has 2 outlets. Any help would be appreciated. I know the free from air pipe goes to the pump but where would the top pipe go. Thanks and sorry in advance.