There is a 3-way shutoff valve in our propane system which supplies both the stove and the the propane heater. The heater is connected via a copper tube, so the only flexible hose goes towards the gimbals stove and it was due to replace it. I installed a new 10mm hose terminal to the 3-way valve as the old was 8mm and not the proper size for the hose which is 10mm towards this stove. The valve was labeled and every connection was leakage tested after the assembly. We have an internal battery powered gas alarm under the stove and now we got a second alarm installed in the head, where the Gastherm propane heater is located. This alarm runs from the boat’s batteries and is connected to the always-on busbars.