Price: $19.95
AVAILABILITY:
Availability: In Stock - Usually ships in 1 to 2 days.

This cylinder tube powers the Univent and Ventomax automatic openers with no need for electricity. It contains a mineral wax which expands with heat. This pushes a piston which opens the auto vent via a balanced linkage. As the temperature drops, the wax shrinks and a strong spring closes the vent and resets the piston. Made in Denmark.

While this automatic vent opener cylinder lasts a long time, eventually the piston rod moving through the seals will wear the seal material away, allowing a gradual seepage of wax out of the tube. This in turn reduces the pressure within the tube and eventually the opening distance achieved will be affected. This is when you need to replace the power tube cylinder.

Overall Customer Rating of 7 Reviews:
review-star review-star review-star review-star review-star
Nc

Replacement part

Rating:
review-star review-star review-star review-star review-star
When putting up our greenhouse, a friend forced open the Univent. In doing so he broke the piston. It was nice to know that they carried a replacement part, and I didn’t have to order the whole vent again. I did not ask them to replace it since it was totally our fault it broke. The part came on just two days.

CA

Tecnik cylinder

Rating:
review-star review-star review-star review-star review-star
I spent a lot of time looking for a replacement piston for my greenhouse vent opener; most are too long for my opener and extend several inches when closed. Apparently mine is a Teknic and needs to have the piston with almost no extension when closed, and this one was perfect. Customer service was very responsive in giving me dimensions which allowed me to confidently make the purchase. Thank you

Univent replacement power tube

Rating:
review-star review-star review-star review-star review-star
I purchased the Univent replacement power tube. I received it fairly quickly and it works great.

Perfect

Rating:
review-star review-star review-star review-star review-star
Item was a perfect fit; works exactly as it should.

Arkansas

Univent Ventomax Replacement Power Tube

Rating:
review-star review-star review-star review-star review-star
Units arrived in great shape and very quickly. They fit our units and work perfectly! Would recommend ACF Greenhouses - nice people and they know their products. Will certainly use them again!
Dave