I wanted the water system installed before starting the above-deck work because I needed to route the fill and vent pipe through the floor but make sure it all fit in the same area where the pump mount was planned. I think this was the first time in my life that everything went smoothly and as planned. The water pump brackets are very rigid and securely hold the pump a few inches below the bottom of the deck. I mounted it so that the plumbing would have a minimum number of elbows. The tank has 2 barbed 1/2″ water exits at the bottom. I brought them together in a 1/2″ x 1/2″ x 3/4″ tee that goes into the 3/4″ inlet of the pump. The exit of the pump goes out to an upward facing elbow and then connects to a section of flexible clear hose before passing through the floor into a barb to PVC union.
I jogged the 1.25″ fill tube (gravity fill) at the forward top of the tank back a few inches so that it wouldn’t interfere with the walls I have planned. The last 1/2″ barbed fitting at the rear top of the tank is for a vent which also goes up through the floor.
I will have that exit the wall below the fill tube so that water will run out to indicate that the tank is full. I would connect it to a car battery and test it with water but I don’t want to get the tank wet with such a long road ahead and then have mold develop. Everything lines up well and looks as good as I could have hoped for.