Nice build on that water tower Rog! Have you thought about adding a Jensen tube style sight glass to it? I use an Ozsteamdemon water tower and when it’s full, the weight of the water must make it easier to pump because I gain a porthole sight glass of water over a half an hour or so and if I let the tower get less than half full I notice my boiler water level drops, but very slowly. At first glance, I thought your grease gun coupling was a 50 safety valve body.