Hi, looking for some help on an issue with our shower. We have two showers running off a Salamander pump. One of the showers was only installed about two weeks ago, but has been working perfectly fine. If I turn on either shower in the respective ensuite’s, only hot water comes out! I can feel the pipework into the pump is cold one end and hot the other; however, the two outlet pipes are both hot! I removed the pump (for access) to check the feed and supply pipes. 22mm hot supply straight from the hot tank is fine, and if I open the shower valves and blow down the pipework, I can get water through. Cold water supply to pump is clear. If I try to blow into the cold feed to the shower, nothing! However, if I take out the thermostatitic valve out of one of the showers and try blowing down the pipe again, it seems fine. I can’t easily remove the valve from the new shower, but am assuming it functions the same. With the shower turned on, should I be able to ‘blow’ air through (just my own puff!) or does it onl open with high flow/pressure? Is the lack of cold water due to the pump? Any help very much appreciated!