Solar Auto Close Air Vent

Solar Auto Close Air Vent is used in closed loop solar heating loops. These air vents automatically shut off when a system goes into stagnation, thereby maintaining the system’s pressure.



Solar Air Vent Kit – Auto Close Automated Solar Vent




duo solar piping

SpiroTech AutoClose Solar Air Vent Kit – 3/4″ NPT


Download Solar AutoClose Specification PDF


Products for solar applications

Spirotech offers an extensive range of automatic air vents and deaerators for solar heating systems. These products are specially designed and developed further for use at higher pressures and temperatures. Just like the rest of our product range, the solar applications of Spirotech are 100% leak-free. They are a reliable and low-maintenance factor in your installation.


Dual effect

In terms of solar applications, too, our products have a dual effect. SpiroTop automatic air vents and SpiroVent deaerators improve the efficiency of your installation and save time and money during their installation, commissioning and maintenance.


Continuous deaeration also available for solar systems

Extremely high temperatures can occur in solar systems, which leads to the formation of steam. Valves are installed to prevent vapour release and overheating. Without valves, solar systems can even boil dry.

Thanks to a patented invention, Spirotech can offer a solar product range with the so-called AutoClose function. These valves only close if it is really necessary.


AutoClose benefits:

  • system will not boil dry via the deaerator;
  • a permanent air-free, efficient installation;
  • solar fluid will not prematurely degenerate;
  • no more climbing to the top to deaerate;
  • prevents false stagnation;
  • suitable for new and existing installations.



Return Policy


We want you to be 100% satisfied with your purchase, if you are not, ship it back to us in the original packaging condition and we will refund your purhase less a 10% restocking fee, provided the equipment is received in good condition. Refund offer valid for 30 days from receipt of product.




We feel that being honest is a much better policy to win your trust rather than trying to lure you with nearly impossible statements such as life time warranty. Nothing lasts forever! Our warranty policy is simple; we offer a 3 year warranty on everything we sell and 10 years on our collectors. With this warranty you will get NO hassle next business day replacement (if shipping service and inventory permits). However, as a valued customer you will get technical support through the life time ownership of your product. Our Collector do carry longer warranties 10 years from the manufacture. The warranty cover failures that occur durring normal operational conditions or manufactures defects. It does not cover failure due to inapproptiate operation such as freezing or over heat. Damage caused by vandalism, storms, floods etc. Your houshold insurance should be modified to cover the system from such situations.

We accept PayPal and Credit card (Visa or Mastercard). If you are ordering multiple units and part, please call us to see if we can save you shipping cost for multiple item orders.


For complete solar kits please allow 2-3 weeks delivery. These kits are shipped via our preferred freight forwarder company and where possible we will schedule residential tailgate delivery (curbside). Heaters and accessories are usually in stock unless indicated otherwise. We do have expedited shipping services available for an additional fee. Please call us if you need a rush order. Once your order has been shipped you will be contacted via email and a tracking number will be provided.

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