- 110 Bar max pressure

- 12-15 Lpm flow

- 75°C max water temperature

- Trapped pressure valve & bypass

- Adjustable chemical injection

- Fits Interpump 51 series pumps

- Brass & stainless steel construction

- M22 M inlet

- M22 M outlet

Interpump W1.1 Controlset Trapped Pressure Valve & Bypass. The Interpump W1.1 automatic pressure regulator is a manually-adjustable, pressure-operated device which, according to its setting, limits the pump/system pressure by conveying the excess of water to the by-pass. Moreover, when the outlet flow is blocked, this device totally releases the flow, and keeps under pressure the portion of the system following the valve, while it reduces the pressure in the portion of the system preceding the valve.