Hiwi Pressure Reducer + SV + RV + Adapter for Sodastream Cylinder

Hiwi Pressure Reducer + SV + RV + Adapter for Sodastream Cylinder

  • Can be used in combination with Sodastream cylinders
  • Suitable for use with inline atomizers
  • With highly precise fine needle valve
  • Manometer for working and cylinder pressure included
  • Facilitates precise adjustments to the CO2 supply
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This high-quality pressure regulator by Hiwi is specially designed for the use on Sodastream Cylinders. It is operated to reduce the pressure inside the cylinder to a working pressure of approx. 1 to 3 bar. By combining the working pressure manometer and the cylinder pressure manometer you can regulate the CO2 supply very precisely and you know at once when it is time to change the cylinder. The integrated fine needle valve allows a very precise regulation of the CO2 supply for the aquarium. In addition, a check valve secures the pressure regulator from back running water. Moreover, this pressure regulator comes with a preinstalled solenoid valve for a night shut off, so that inhabitants of the tank, like e.g. fish and shrimps, can recover from the elevated CO2 levels during the day.

Please keep in mind that the manufacturer has glued the needle valve to the pressure regulator. Thus it can not be removed without damage. If the needle valve is removed, the manufacturer's liability will expire prematurely.

Manual (in German Language) - - download PDF


  • The connection for the CO2 tubing is equipped with a metric thread (M6)
  • The pressure regulator is designed for Sodastream Cylinders only
  • No special adapter necessary
  • high-quality solenoid valve with low energy consumption. The solenoid valve is firmly attached to the pressure regulator.
  • 1.5 m power supply cord with "Schuko" plug
  • power supply: 230 V AC; 50/60 Hz; 1,6 VA open
  • closed when without current
  • 100 % ED (suitable for continuous operation)
  • permissible temperature: -30 - 130 ºC
  • max. ambient temperature: 40 ºC
  • protection class IP65 (dust-proof and protected against jets of water)
  • insulation class F (155 °C) screwed to plug
  • max. pressure difference: 16 bar
  • A check valve secures the entire CO2 supplying system. It is firmly connected with the solenoid valve and the pressure regulator
  • with German instructions of use


Please use the pressure reducer only after reading the operating instructions, which are linked above.

  • Make sure that you really start the pressure reducer with a CO2 bottle.
  • Turn the working pressure adjustment screw (operating instructions 4) counterclockwise.
  • Close the fine needle valve (operating manual 5) by turning it clockwise. CAUTION: Tighten only slightly!
  • Position the pressure reducer so that the pressure gauges are facing upwards.
  • Fasten and tighten the pressure reducer to the CO2 cylinder using the union nut (operating instructions 7). The union nut must be tightened by hand! Tools must not be used at this point!
  • It is essential to ensure that the seal is correctly seated and that the sealing surfaces are clean. If the seal is is damaged or lost, please replace it.


Hiwi Pressure Reducer + SV + RV + Adapter
Wide 180 mm
Height 120 mm
Depth 85 mm
Meas. from connection 125 mm



Hiwi is a renowned German manufacturer of CO2 pressure regulators. The highest level of quality and a long useful life are in their focus. These high quality standards do not exclude attractive prices, though.

Especially in aquascaping, the addition of CO2 for the plants is something very basic, and thus it is really important to choose good CO2 supplying equipment. Hiwi meets even the highest quality standards in every aspect und is thus the best choice when it comes to CO2 pressure regulators.

General information

Item no.
Weight 1,00 kg
Shipping weight 2,10 kg

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Customer reviews

This item has been rated 5 out of 5 stars
4 Reviews
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5 Stars(4)
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3 Stars(0)
2 Stars(0)
1 Star(0)
Hanna K.
Works great!
20th February 2022

Really easy to install, works as promised. I´ve used it about a month so far, but no hassle with it.

Stefan A.
7th February 2022

Easy to install and use with a sodastream bottle. No tools needed. High quality in every way! Would have liked the manual to be in english and not only in german.

Sanna W.
Great quality and easy to use
27th August 2021

Perfect, easy to use and made from quality parts.

Easy to install, instructions only in German, but you dont really need them.

Really recommend it.

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