i have a 24 vac transformer for 4 honeywell ta87 stats. the anticipators are all set at 400 milliamps. do i just multiply 4x.4x24 to get the total VA for this setup?? if so, i get about 38.4 VA. if that is correct do i need a 40 VA transformer??

Ok, here is my dillema, we replaced a bunch of galvanized water pipes in the house with PVC, this was to improve water pressure to the rest of the house. One of the pipes we replaced goes to the pressure reducing valve for the boiler (it is a B&G model 12, it is red and have an adjusting screw on the top). Ever since we replaced the pipes and the water pressure has increased, the boiler is holding at around 15-16 PSI when it is off, I know it is supposed to be at 12 PSI for a 2 story house. I have tried adjusting the screw but the pressure still climbs up to 15-16 PSI. I have backed it off quite a bit, it seems like it just takes longer to get up to 15-16 PSI. I am thinking this needs to be replaced, but I am wondering if I can replace it with a different reducing valve, or if it has to be the same type. I want the cheapest and simplest to install. I have already replaced my pressure relief valve, because the first time the high pressure tripped the valve, it began a drip leak that would not stop, after replacing the valve that has gone away, however it is still tripping everytime the boiler fires as the pressure is getting up to at least 30 PSI. Any help on this would be appreciated. I have also emptied the expansion tank as I thought that could also be a problem. Could I turn off the water supply line until I get the reducing valve replaced? If I am correct as long as I am not losing an significant amount of water this would retain the 12 PSI that I am looking for. Thanks.