Hello people good afternoon, I ask for your help to see if I can solve this problem of hot water. The subject is like that 1 I have little pressure on the hot water line, when I open the shower it takes several minutes to fill the flow of the flower and get out hot. 2 when it comes out hot it seems as if the flow rate is intermittent, could it be that I had sucking air And if I open a little the cold cools in seconds ... 3 The lowering of the tank is individual to the rest of the house, it has a single descent for the 1/2 "thermos and the whole network is also on average but the entry and exit of the thermos is 3/4, can that affect? ??? They recommended me to do the descent of 3/4, is correct or would not modify anything ???? Of course I would appreciate those who can advise me, I understand other issues but in this plumbing nothing. Thank you very much and greetings !!!