Putting In A New Water-Pump & Accumulateur

[KCTractors]

I want to put in a new water-pump ( Shurflo Revolution 4008 ) with a Shurflo Reservoir Accumulator, so when somebody gets up during the night to use the bathroom, so that the water-pump does not come every time.
My question is when winterizing the water system, I like to use air to blow the water out and then but in the pink antifreeze. I then blow the pink stuff out again. Will the accumulator empty out with the air-pressure?

[Ram Montana High Country]

Where is the connection to accumulator? My thought is, if it is down that gravity and air should eliminate concerns - have not review those systems ...

[KCTractors]

I did not do anything yet. I want to wait and see the response I get.

[Ram Montana High Country]

In looking at the pump and accumulator - I'd mount both so the water would drain - which is NOT how the manufacturer thinks

[rohrmann]

The accumulator tank has a bladder inside that is pressurized with a Schrader valve at the other end of the tank from where it connects to the water plumbing. When the water system is under pressure from the pump, the air in the dry side of the bladder is compressed and the bladder moves toward the air valve side of the tank. When you open a faucet, the air pressure pushes the bladder to move water into the plumbing system until the pump finally activates which will then move the bladder back toward the air valve side. When there is no pressure in the system but the dry side of the bladder is still pressurized, the bladder will be fully pushed against the wet side of the tank, so when winterizing, there will be no water or antifreeze inside the wet side of the accumulator.