Why does it take so long to fill my Type 1 system?

Typically when you have a problem with your Type 1 fill, the first thing to check for is going to be air in your line.

Sometimes the diaphragm pump has a hard time moving air, especially if there's fluid ahead of the air in the circuit.

The air wants to compress and decompress with every rotation of the pump instead of moving.

So one of the first things you should do is probably try to purge air from your fill hose.

Another common issue is using the Type 1 pump button instead of the suction fill button on your menu page.

If you use the Type 1 pump button, you are going to suck fluid out of your external source, but it's going to take longer. You are going to flow less fluid with every rotation of the pump.

The reason for that is that when you run the pump normally, you are pushing your fluid through your Type 1 heater and then over a relief valve before it goes back to the tank.

That reduces your flow somewhat, so that normally that fluid running through the heater can pick up some heat.

Now, when you use the suction fill button, this electronic ball valve opens a more direct path back to the tank with very little resistance.

There is a relief valve that provides some resistance to the flow and keeps the pump from over-speeding or running away.

What position should the electronic ball valve be in?

It should be open if you are suction filling.

If you hit the suction fill button, your pump should be on and this valve should be open, allowing the fluid to run in this direction instead of toward your heater.

There's another problem you might have with suction fill, and it will coincide with a Type 1 system's pressure drop for spraying operations under normal conditions.

Right here you have a Y-strainer. So if this thing picks up enough trash, it will clog and restrict the amount of flow going into the suction side of the pump.

That will result in less fluid going to the tank if you are trying to suction fill.

And if you are trying to spray an airplane, it will result in reduced pressure and flow through your spray nozzle.