{"product_id":"alton-bayliss-xl-piston","title":"Alton Bayliss XL Piston","description":"\u003cdiv style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/moderngardendirect.com\/collections\/alton?grid_list=grid-view\u0026amp;filter.v.price.gte=\u0026amp;filter.v.price.lte=\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0886\/9396\/5106\/files\/alton-wooden-greenhouses_160x160.png?v=1735121081\" style=\"margin-bottom: 16px; float: none; display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003ch4 style=\"text-align: center;\"\u003eAlton Bayliss XL Piston\u003c\/h4\u003e\n\u003cdiv class=\"container\"\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-md-4 d-none d-xl-block linksun lispace\"\u003e\n\u003cdiv class=\"product-tabs\"\u003e\n\u003cdiv id=\"tab-content\" class=\"tab-content responsive hidden-xs hidden-sm\"\u003e\n\u003cdiv id=\"tab_info\" class=\"tab-pane active\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:f44c781a-5de3-403d-836e-f68da82ba33e-4\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:f44c781a-5de3-403d-836e-f68da82ba33e-4\" data-turn-id-container=\"request-WEB:f44c781a-5de3-403d-836e-f68da82ba33e-4\" data-testid=\"conversation-turn-2\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"5e4b229e-572b-49b9-832f-fee237fbc39a\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\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\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul class=\"content-p\"\u003e\n\u003cli\u003eDesigned for Bayliss XL only: Compatible exclusively with the Bayliss XL Autovent.\u003c\/li\u003e\n\u003cli\u003eRestores vent performance: Brings your automatic opener back to proper working condition.\u003c\/li\u003e\n\u003cli\u003eHeat-activated operation: Uses wax expansion for reliable, power-free control.\u003c\/li\u003e\n\u003cli\u003eCost-effective solution: Extend the life of your existing vent opener.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePRODUCT TYPE: Replacement power tube\u003c\/li\u003e\n\u003cli\u003eCOMPATIBILITY: Bayliss XL Automatic Vent Opener only\u003c\/li\u003e\n\u003cli\u003eLENGTH (EXCLUDING PISTON): 7.38 inches\u003c\/li\u003e\n\u003cli\u003eLENGTH (METRIC): 18.75 cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation guide\u003c\/h3\u003e\n\u003cp class=\"content-p\"\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 class=\"content-p\"\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 class=\"content-p\"\u003eSkipping the cooling step may prevent the unit from being set correctly.\u003c\/p\u003e\n\u003ch3 class=\"content-p\"\u003eMaintenance and care\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\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\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cdiv class=\"product-description-area\"\u003e\n\u003cdiv class=\"product-tabs-9219290038421\"\u003e\n\u003cdiv class=\"product-single__accordion__item js-unique-info showC4 js-active\" id=\"acc-unique-0\"\u003e\n\u003cdiv class=\"product-single__accordion__item-wrap\"\u003e\n\u003cul\u003e\n\u003cli class=\"content-p\"\u003eWhat does the power tube do?\u003cbr\u003eThe power tube contains a wax-filled cylinder that expands with heat, pushing the piston to open your greenhouse vent automatically.\u003c\/li\u003e\n\u003cli class=\"content-p\"\u003eWhy do I need to refrigerate the tube before installation?\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\/li\u003e\n\u003cli class=\"content-p\"\u003eWill this fit other auto vent brands?\u003cbr\u003eNo. This replacement tube is designed specifically for the Bayliss XL Autovent and will not fit standard or non-XL models.\u003c\/li\u003e\n\u003cli class=\"content-p\"\u003eWhen should I replace the power tube?\u003cbr\u003eIf your vent no longer opens fully or responds slowly to temperature changes, replacing the power tube can restore proper operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cul class=\"content-p\"\u003e\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Alton","offers":[{"title":"Default Title","offer_id":51212444434738,"sku":"ALTBATUBBCA","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/9396\/5106\/files\/main-image-white-background_fef33555-8674-4605-9c04-1b39e7c48024.jpg?v=1779794261","url":"https:\/\/moderngardendirect.com\/products\/alton-bayliss-xl-piston","provider":"Modern Garden Direct","version":"1.0","type":"link"}