A20: the universal expansion vessel,
The ideal complement to the aqua 8, aqua f, previous versions, and any other type of pressure-switch pump, such as shurflo and flojet.
The a20 expansion vessel eliminates the pulsar operation of pressure-switch pumps and provides a constant flow of water in the required quantity.
It extends the life of the pump and boiler, reduces water consumption.
The internal membrane absorbs water hammer and outputs a regular flow.
The a20 can be dismantled for any work on the membrane.
It is pre-charged to 0.9 bar (13 psi), but can be charged using the appropriate valve with a standard compressor, to be adapted to all commercially available pressure switch pumps.

It can be connected to 12 mm john guest pipes using the fitting item: csm2147.