{"product_id":"alton-bayliss-xl-roof-vent-opener-piston-replacement","title":"Alton | Bayliss XL Roof Vent Opener Piston Replacement","description":"\u003cp\u003eThe Bayliss XL Piston or Power Tube is a direct replacement component designed specifically for the Bayliss XL Automatic Greenhouse Vent Opener. If your current unit is no longer responding as it should, replacing the power tube is a simple and cost-effective way to restore smooth, temperature-driven vent operation.\u003c\/p\u003e\n\u003cp\u003eThis tube contains a heat-sensitive wax core that expands as temperatures rise and contracts as they fall, driving the piston that opens and closes your greenhouse vent automatically. It helps maintain a stable growing environment without electricity or manual adjustment.\u003c\/p\u003e\n\u003ch6\u003eKEY FEATURES\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for Bayliss XL only:\u003c\/strong\u003e Compatible exclusively with the Bayliss XL Autovent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestores vent performance:\u003c\/strong\u003e Brings your automatic opener back to proper working condition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat-activated operation:\u003c\/strong\u003e Uses wax expansion for reliable, power-free control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCost-effective solution:\u003c\/strong\u003e Extend the life of your existing vent opener.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eSPECIFICATIONS\u003c\/h6\u003e\n\u003cdiv style=\"background-color: #f4f8f2; padding: 18px; border-radius: 12px; margin: 14px 0;\"\u003e\n\u003cp\u003e\u003cstrong\u003ePRODUCT TYPE:\u003c\/strong\u003e Replacement power tube\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBILITY:\u003c\/strong\u003e Bayliss XL Automatic Vent Opener only\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLENGTH (EXCLUDING PISTON):\u003c\/strong\u003e 7.38 inches\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLENGTH (METRIC):\u003c\/strong\u003e 18.75 cm\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch6\u003eINSTALLATION GUIDE\u003c\/h6\u003e\n\u003cp\u003eFor accurate setup and proper function, the power tube must be cooled before installation. Place the tube in a refrigerator for approximately 30 minutes to allow the wax inside to contract.\u003c\/p\u003e\n\u003cp\u003eAfter cooling, press the piston rod firmly against a hard surface until it retracts into the tube. Install the unit with the vent arms in the closed position to ensure proper alignment with the vent and mounting points.\u003c\/p\u003e\n\u003cp\u003eSkipping the cooling step may prevent the unit from being set correctly.\u003c\/p\u003e\n\u003ch6\u003eMAINTENANCE AND CARE\u003c\/h6\u003e\n\u003cp\u003eEnsure the piston remains clean and free of debris for smooth operation. Periodically check alignment and mounting points to maintain consistent vent performance over time.\u003c\/p\u003e\n\u003ch6\u003eFREQUENTLY ASKED QUESTIONS\u003c\/h6\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the power tube do?\u003c\/strong\u003e\u003cbr\u003eThe power tube contains a wax-filled cylinder that expands with heat, pushing the piston to open your greenhouse vent automatically.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do I need to refrigerate the tube before installation?\u003c\/strong\u003e\u003cbr\u003eCooling the tube contracts the wax inside, allowing the piston to reset properly so the vent opener can be installed and calibrated accurately.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit other auto vent brands?\u003c\/strong\u003e\u003cbr\u003eNo. This replacement tube is designed specifically for the Bayliss XL Autovent and will not fit standard or non-XL models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should I replace the power tube?\u003c\/strong\u003e\u003cbr\u003eIf your vent no longer opens fully or responds slowly to temperature changes, replacing the power tube can restore proper operation.\u003c\/p\u003e","brand":"Alton","offers":[{"title":"Default Title","offer_id":47355223900309,"sku":"ALTBATUBBCA","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0097\/9959\/8140\/files\/Bayliss-XL-Autovent-piston.jpg?v=1778817433","url":"https:\/\/mygreenhousestore.com\/products\/alton-bayliss-xl-roof-vent-opener-piston-replacement","provider":"MyGreenhouseStore.com","version":"1.0","type":"link"}